リモートの Ubuntu 14.04 LTS ホストには、USN-3753-2のアドバイザリに記載された複数の脆弱性の影響を受けるパッケージがインストールされています。

  -カーネルscsiビデオドライバーの権限の昇格の脆弱性。製品：Android。バージョン: Androidカーネル。Android ID A-65023233。（CVE-2017-13168）

  - Linux カーネルの ext4 ファイルシステムコードに欠陥が見つかりました。細工された ext4 イメージをマウントして操作するとき、ext4_ext_remove_space() 関数でメモリ解放後使用 (Use After Free) が発生する可能性があります。(CVE-2018-10876)

  - Linux カーネルの ext4 ファイルシステムは、細工された ext4 ファイルシステムイメージを操作する場合に ext4_ext_drop_refs() 関数の領域外アクセスに対して脆弱です。(CVE-2018-10877)

  - Linux カーネルの ext4 ファイルシステムに欠陥が見つかりました。細工されたext4ファイルシステムイメージをマウントして操作することにより、ローカルユーザーが、領域外書き込みを発生させ、サービス拒否を引き起こしたり、詳細不明なその他の影響を与えたりする可能性があります。（CVE-2018-10878）

  - Linux カーネルの ext4 ファイルシステムに欠陥が見つかりました。ローカルユーザーがext4_xattr_set_entry関数でメモリ解放後使用（Use After Free）を引き起こす可能性があり、細工されたext4ファイルシステムイメージ内のファイル名を変更することでサービス拒否またはその他の詳細不明な影響が発生する可能性があります。（CVE-2018-10879）

  - Linux カーネルの ext4 ファイルシステムに欠陥が見つかりました。細工されたext4ファイルシステムイメージをマウントして操作することにより、ローカルユーザーが、ext4_get_group_info関数に領域外アクセスを発生させ、サービス拒否およびシステムクラッシュを引き起こす可能性があります。（CVE-2018-10881）

  - Linux カーネルの ext4 ファイルシステムに欠陥が見つかりました。細工されたext4ファイルシステムイメージをアンマウントすることにより、ローカルユーザーが、fs/jbd2/transaction.cコードで領域外書き込みを発生させ、サービス拒否およびシステムクラッシュを引き起こす可能性があります。（CVE-2018-10882）

  - 4.17.1 までの Linux カーネルの fs/jfs/xattr.c の ea_get 関数で、同じファイルの 2 つの異なる拡張属性名で setxattr を 2 回呼び出すことで、JFS のメモリ破損のバグがトリガーされることがありました。この脆弱性は、ファイルを作成してプログラムを実行できる非特権ユーザーによって引き起こされる可能性があります。kmalloc の呼び出しが不適切で、jfs_xattr でスラブ領域外読み取りを引き起こします。
    (CVE-2018-12233)

  - 4.17.3までのLinuxカーネルのfs/xfs/libxfs/xfs_attr_leaf.cに問題が発見されました。NULL bpを使用してxfs_da_shrink_inode()を呼び出した後、破損したxfsイメージに対してOOPSが発生する可能性があります。(CVE-2018-13094)

  - 3.16 までの Linux カーネルの fs/inode.c にある inode_init_owner 関数により、ディレクトリが特定グループへの SGID であり、そのグループのメンバーではないユーザーにより書き込み可能であるというシナリオにおいて、ローカルユーザーが意図しないグループ所有権でファイルを作成する可能性があります。ここでは、非メンバーが、グループ所有権がそのグループであるプレーンファイルの作成をトリガーできます。意図された動作として、非メンバーがグループ所有権がそのグループであるディレクトリの作成をトリガーできます。非メンバーは、プレーンファイルを実行可能ファイルと SGID にすることで、権限を昇格できます。(CVE-2018-13405)

  - 4.17.4 以前の Linux カーネルでは kmalloc_array が使用されていないために、drivers/video/fbdev/uvesafb.c の uvesafb_setcmap 関数での整数オーバーフローが生じ、ローカルの攻撃者がカーネルをクラッシュさせたり、権限を昇格させたりする可能性があります。(CVE-2018-13406)

Nessus はこれらの問題をテストしておらず、代わりにアプリケーションが自己報告するバージョン番号にのみ依存していることに注意してください。

v4.17.5更新には、ツリーにわたる重要な修正が含まれています

注意：Tenable Network Securityは、前述の記述ブロックをFedora更新システムのWebサイトから直接抽出しています。
Tenableでは、そこに新しい問題を追加することはせずに、できる限り自動的に整理と書式設定をするようにしています。

The v4.17.5 update contains important fixes across the tree

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in the Linux kernel before     4.18.7. In block/blk-core.c, there is an
    __blk_drain_queue() use-after-free because a certain     error case is mishandled.(CVE-2018-20856)

  - In the Linux kernel before 5.1.7, a device can be     tracked by an attacker using the IP ID values the     kernel produces for connection-less protocols (e.g.,     UDP and ICMP). When such traffic is sent to multiple     destination IP addresses, it is possible to obtain hash     collisions (of indices to the counter array) and     thereby obtain the hashing key (via enumeration). An     attack may be conducted by hosting a crafted web page     that uses WebRTC or gQUIC to force UDP traffic to     attacker-controlled IP addresses.(CVE-2019-10638)

  - The Linux kernel 4.x (starting from 4.1) and 5.x before     5.0.8 allows Information Exposure (partial kernel     address disclosure), leading to a KASLR bypass.
    Specifically, it is possible to extract the KASLR     kernel image offset using the IP ID values the kernel     produces for connection-less protocols (e.g., UDP and     ICMP). When such traffic is sent to multiple     destination IP addresses, it is possible to obtain hash     collisions (of indices to the counter array) and     thereby obtain the hashing key (via enumeration). This     key contains enough bits from a kernel address (of a     static variable) so when the key is extracted (via     enumeration), the offset of the kernel image is     exposed. This attack can be carried out remotely, by     the attacker forcing the target device to send UDP or     ICMP (or certain other) traffic to attacker-controlled     IP addresses. Forcing a server to send UDP traffic is     trivial if the server is a DNS server. ICMP traffic is     trivial if the server answers ICMP Echo requests     (ping). For client targets, if the target visits the     attacker's web page, then WebRTC or gQUIC can be used     to force UDP traffic to attacker-controlled IP     addresses.(CVE-2019-10639)

  - The Linux kernel was found vulnerable to an integer     overflow in the     drivers/video/fbdev/uvesafb.c:uvesafb_setcmap()     function. The vulnerability could result in local     attackers being able to crash the kernel or potentially     elevate privileges.(CVE-2018-13406)

  - The SCTP socket buffer used by a userspace application     is not accounted by the cgroups subsystem. An attacker     can use this flaw to cause a denial of service     attack.(CVE-2019-3874)

  - The Linux kernel before 5.1-rc5 allows     page-i1/4z_refcount reference count overflow, with     resultant use-after-free issues, if about 140 GiB of     RAM exists. This is related to fs/fuse/dev.c,     fs/pipe.c, fs/splice.c, include/linux/mm.h,     include/linux/pipe_fs_i.h, kernel/trace/trace.c,     mm/gup.c, and mm/hugetlb.c. It can occur with FUSE     requests.(CVE-2019-11487)

  - A flaw was found in the Linux kernel's implementation     of ext4 extent management. The kernel doesn't correctly     initialize memory regions in the extent tree block     which may be exported to a local user to obtain     sensitive information by reading empty/uninitialized     data from the filesystem.(CVE-2019-11833)

  - A flaw was found in the Linux kernel's implementation     of the Bluetooth Human Interface Device Protocol     (HIDP). A local attacker with access permissions to the     Bluetooth device can issue an IOCTL which will trigger     the do_hidp_sock_ioctl function in     net/bluetooth/hidp/sock.c.c. This function can leak     potentially sensitive information from the kernel stack     memory via a HIDPCONNADD command because a name field     may not be correctly NULL terminated.(CVE-2019-11884)

  - The Linux kernel is vulnerable to an out-of-bounds read     in ext4/balloc.c:ext4_valid_block_bitmap() function. An     attacker could trick a legitimate user or a privileged     attacker could exploit this by mounting a crafted ext4     image to cause a crash.(CVE-2018-1093)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

CVE-2017-18249

A race condition was discovered in the disk space allocator of F2FS. A user with access to an F2FS volume could use this to cause a denial of service or other security impact.

CVE-2018-1128, CVE-2018-1129

The cephx authentication protocol used by Ceph was susceptible to replay attacks, and calculated signatures incorrectly. These vulnerabilities in the server required changes to authentication that are incompatible with existing clients. The kernel's client code has now been updated to be compatible with the fixed server.

CVE-2018-3639 (SSB)

Multiple researchers have discovered that Speculative Store Bypass (SSB), a feature implemented in many processors, could be used to read sensitive information from another context. In particular, code in a software sandbox may be able to read sensitive information from outside the sandbox. This issue is also known as Spectre variant 4.

This update adds a further mitigation for this issue in the eBPF (Extended Berkeley Packet Filter) implementation.

CVE-2018-5391 (FragmentSmack)

Juha-Matti Tilli discovered a flaw in the way the Linux kernel handled reassembly of fragmented IPv4 and IPv6 packets. A remote attacker can take advantage of this flaw to trigger time and calculation expensive fragment reassembly algorithms by sending specially crafted packets, leading to remote denial of service.

This was previously mitigated by reducing the default limits on memory usage for incomplete fragmented packets. This update replaces that mitigation with a more complete fix.

CVE-2018-5848

The wil6210 wifi driver did not properly validate lengths in scan and connection requests, leading to a possible buffer overflow. On systems using this driver, a local user with the CAP_NET_ADMIN capability could use this for denial of service (memory corruption or crash) or potentially for privilege escalation.

CVE-2018-12896, CVE-2018-13053

Team OWL337 reported possible integer overflows in the POSIX timer implementation. These might have some security impact.

CVE-2018-13096, CVE-2018-13097, CVE-2018-13100, CVE-2018-14614, CVE-2018-14616

Wen Xu from SSLab at Gatech reported that crafted F2FS volumes could trigger a crash (BUG, Oops, or division by zero) and/or out-of-bounds memory access. An attacker able to mount such a volume could use this to cause a denial of service or possibly for privilege escalation.

CVE-2018-13406

Dr Silvio Cesare of InfoSect reported a potential integer overflow in the uvesafb driver. A user with permission to access such a device might be able to use this for denial of service or privilege escalation.

CVE-2018-14610, CVE-2018-14611, CVE-2018-14612, CVE-2018-14613

Wen Xu from SSLab at Gatech reported that crafted Btrfs volumes could trigger a crash (Oops) and/or out-of-bounds memory access. An attacker able to mount such a volume could use this to cause a denial of service or possibly for privilege escalation.

CVE-2018-15471 ((XSA-270)

Felix Wilhelm of Google Project Zero discovered a flaw in the hash handling of the xen-netback Linux kernel module. A malicious or buggy frontend may cause the (usually privileged) backend to make out of bounds memory accesses, potentially resulting in privilege escalation, denial of service, or information leaks.

https://xenbits.xen.org/xsa/advisory-270.html

CVE-2018-16862

Vasily Averin and Pavel Tikhomirov from Virtuozzo Kernel Team discovered that the cleancache memory management feature did not invalidate cached data for deleted files. On Xen guests using the tmem driver, local users could potentially read data from other users' deleted files if they were able to create new files on the same volume.

CVE-2018-17972

Jann Horn reported that the /proc/*/stack files in procfs leaked sensitive data from the kernel. These files are now only readable by users with the CAP_SYS_ADMIN capability (usually only root)

CVE-2018-18281

Jann Horn reported a race condition in the virtual memory manager that can result in a process briefly having access to memory after it is freed and reallocated. A local user could possibly exploit this for denial of service (memory corruption) or for privilege escalation.

CVE-2018-18690

Kanda Motohiro reported that XFS did not correctly handle some xattr (extended attribute) writes that require changing the disk format of the xattr. A user with access to an XFS volume could use this for denial of service.

CVE-2018-18710

It was discovered that the cdrom driver does not correctly validate the parameter to the CDROM_SELECT_DISC ioctl. A user with access to a cdrom device could use this to read sensitive information from the kernel or to cause a denial of service (crash).

CVE-2018-19407

Wei Wu reported a potential crash (Oops) in the KVM implementation for x86 processors. A user with access to /dev/kvm could use this for denial of service.

For Debian 8 'Jessie', these problems have been fixed in version 4.9.144-3.1~deb8u1. This version also includes fixes for Debian bugs #890034, #896911, #907581, #915229, and #915231; and other fixes included in upstream stable updates.

We recommend that you upgrade your linux-4.9 packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The SUSE Linux Enterprise 12 GA LTSS kernel was updated to receive various security and bugfixes. The following security bugs were fixed :

  - CVE-2018-13053: The alarm_timer_nsleep function in     kernel/time/alarmtimer.c had an integer overflow via a     large relative timeout because ktime_add_safe is not     used (bnc#1099924).

  - CVE-2018-13405: The inode_init_owner function in     fs/inode.c allowed local users to create files with an     unintended group ownership, in a scenario where a     directory is SGID to a certain group and is writable by     a user who is not a member of that group. Here, the     non-member can trigger creation of a plain file whose     group ownership is that group. The intended behavior was     that the non-member can trigger creation of a directory     (but not a plain file) whose group ownership is that     group. The non-member can escalate privileges by making     the plain file executable and SGID (bnc#1100416).

  - CVE-2018-13406: An integer overflow in the     uvesafb_setcmap function in     drivers/video/fbdev/uvesafb.c could result in local     attackers being able to crash the kernel or potentially     elevate privileges because kmalloc_array is not used     (bnc#1098016 bnc#1100418).

  - CVE-2018-14734: drivers/infiniband/core/ucma.c allowed     ucma_leave_multicast to access a certain data structure     after a cleanup step in ucma_process_join, which allowed     attackers to cause a denial of service (use-after-free)     (bnc#1103119).

  - CVE-2018-3620: Local attackers on baremetal systems     could use speculative code patterns on hyperthreaded     processors to read data present in the L1 Datacache used     by other hyperthreads on the same CPU core, potentially     leaking sensitive data. (bnc#1087081).

  - CVE-2018-3646: Local attackers in virtualized guest     systems could use speculative code patterns on     hyperthreaded processors to read data present in the L1     Datacache used by other hyperthreads on the same CPU     core, potentially leaking sensitive data, even from     other virtual machines or the host system.
    (bnc#1089343).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The SUSE Linux Enterprise 11 SP3 LTSS kernel was updated to receive various security and bugfixes. The following security bugs were fixed :

  - CVE-2016-8405: An information disclosure vulnerability     in kernel components including the ION subsystem,     Binder, USB driver and networking subsystem could enable     a local malicious application to access data outside of     its permission levels. (bnc#1099942).

  - CVE-2017-13305: A information disclosure vulnerability     existed in the encrypted-keys handling. (bnc#1094353).

  - CVE-2018-1000204: A malformed SG_IO ioctl issued for a     SCSI device could lead to a local kernel information     leak manifesting in up to approximately 1000 memory     pages copied to the userspace. The problem has limited     scope as non-privileged users usually have no     permissions to access SCSI device files. (bnc#1096728).

  - CVE-2018-1068: A flaw was found in the implementation of     32-bit syscall interface for bridging. This allowed a     privileged user to arbitrarily write to a limited range     of kernel memory (bnc#1085107).

  - CVE-2018-1130: A NULL pointer dereference in     dccp_write_xmit() function in net/dccp/output.c allowed     a local user to cause a denial of service by a number of     certain crafted system calls (bnc#1092904).

  - CVE-2018-12233: In the ea_get function in fs/jfs/xattr.c     a memory corruption bug in JFS can be triggered by     calling setxattr twice with two different extended     attribute names on the same file. This vulnerability can     be triggered by an unprivileged user with the ability to     create files and execute programs. A kmalloc call is     incorrect, leading to slab-out-of-bounds in jfs_xattr     (bnc#1097234).

  - CVE-2018-13053: The alarm_timer_nsleep function in     kernel/time/alarmtimer.c had an integer overflow via a     large relative timeout because ktime_add_safe is not     used (bnc#1099924).

  - CVE-2018-13406: An integer overflow in the     uvesafb_setcmap function in     drivers/video/fbdev/uvesafb.c kernel could result in     local attackers being able to crash the kernel or     potentially elevate privileges because kmalloc_array is     not used (bnc#1098016 1100418).

  - CVE-2018-3620: Local attackers on baremetal systems     could use speculative code patterns on hyperthreaded     processors to read data present in the L1 Datacache used     by other hyperthreads on the same CPU core, potentially     leaking sensitive data. (bnc#1087081).

  - CVE-2018-3646: Local attackers in virtualized guest     systems could use speculative code patterns on     hyperthreaded processors to read data present in the L1     Datacache used by other hyperthreads on the same CPU     core, potentially leaking sensitive data, even from     other virtual machines or the host system.
    (bnc#1089343).

  - CVE-2018-5803: An error in the '_sctp_make_chunk()'     function (net/sctp/sm_make_chunk.c) when handling SCTP     packets length could be exploited to cause a kernel     crash (bnc#1083900).

  - CVE-2018-5814: Multiple race condition errors when     handling probe, disconnect, and rebind operations could     be exploited to trigger a use-after-free condition or a     NULL pointer dereference by sending multiple USB over IP     packets (bnc#1096480).

  - CVE-2018-7492: A NULL pointer dereference was found in     the net/rds/rdma.c __rds_rdma_map() function allowing     local attackers to cause a system panic and a     denial-of-service, related to RDS_GET_MR and     RDS_GET_MR_FOR_DEST (bnc#1082962).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3753-2 advisory.

    USN-3753-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the     corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu     14.04 LTS.

    It was discovered that the generic SCSI driver in the Linux kernel did not properly enforce permissions on     kernel memory access. A local attacker could use this to expose sensitive information or possibly elevate     privileges. (CVE-2017-13168)

    Wen Xu discovered that a use-after-free vulnerability existed in the ext4 filesystem implementation in the     Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could     cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10876,     CVE-2018-10879)

    Wen Xu discovered that a buffer overflow existed in the ext4 filesystem implementation in the Linux     kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a     denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10877)

    Wen Xu discovered that an out-of-bounds write vulnerability existed in the ext4 filesystem implementation     in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted,     could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10878,     CVE-2018-10882)

    Wen Xu discovered that the ext4 filesystem implementation in the Linux kernel did not properly keep meta-     data information consistent in some situations. An attacker could use this to construct a malicious ext4     image that, when mounted, could cause a denial of service (system crash). (CVE-2018-10881)

    Shankara Pailoor discovered that the JFS filesystem implementation in the Linux kernel contained a buffer     overflow when handling extended attributes. A local attacker could use this to cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2018-12233)

    Wen Xu discovered that the XFS filesystem implementation in the Linux kernel did not properly handle an     error condition with a corrupted xfs image. An attacker could use this to construct a malicious xfs image     that, when mounted, could cause a denial of service (system crash). (CVE-2018-13094)

    It was discovered that the Linux kernel did not properly handle setgid file creation when performed by a     non-member of the group. A local attacker could use this to gain elevated privileges. (CVE-2018-13405)

    Silvio Cesare discovered that the generic VESA frame buffer driver in the Linux kernel contained an     integer overflow. A local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2018-13406)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	名前	製品	ファミリー	公開日	更新日	深刻度
112112	Ubuntu 14.04 LTS : Linux カーネル (Xenial HWE) の脆弱性 (USN-3753-2)	Nessus	Ubuntu Local Security Checks	2018/8/24	2024/8/27	high
111416	openSUSEセキュリティ更新プログラム：Linux カーネル（openSUSE-2018-764）	Nessus	SuSE Local Security Checks	2018/7/30	2024/9/2	high
111243	Fedora 27：kernel（2018-8484550fff）	Nessus	Fedora Local Security Checks	2018/7/24	2024/9/3	high
120418	Fedora 28 : kernel (2018-50075276e8)	Nessus	Fedora Local Security Checks	2019/1/3	2024/7/5	high
129261	EulerOS 2.0 SP3 : kernel (EulerOS-SA-2019-2068)	Nessus	Huawei Local Security Checks	2019/9/24	2024/4/23	high
122879	Debian DLA-1715-1 : linux-4.9 security update (Spectre)	Nessus	Debian Local Security Checks	2019/3/18	2024/6/13	high
123226	openSUSE Security Update : the Linux Kernel (openSUSE-2019-536) (Spectre)	Nessus	SuSE Local Security Checks	2019/3/27	2024/6/11	high
111830	SUSE SLES12 Security Update : kernel (SUSE-SU-2018:2362-1) (Foreshadow)	Nessus	SuSE Local Security Checks	2018/8/17	2024/8/16	high
111833	SUSE SLES11 Security Update : kernel (SUSE-SU-2018:2366-1) (Foreshadow)	Nessus	SuSE Local Security Checks	2018/8/17	2024/8/16	high
112112	Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-3753-2)	Nessus	Ubuntu Local Security Checks	2018/8/24	2024/8/27	high
111416	openSUSE Security Update : the Linux Kernel (openSUSE-2018-764)	Nessus	SuSE Local Security Checks	2018/7/30	2024/9/2	high
111243	Fedora 27 : kernel (2018-8484550fff)	Nessus	Fedora Local Security Checks	2018/7/24	2024/9/3	high

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