Ubuntu 10.04 LTS : linux-ec2 vulnerabilities (USN-1239-1)

critical Nessus プラグイン ID 56638
New! プラグインの深刻度には CVSS v3 が適用されるようになりました。

プラグインの深刻度は、デフォルトで CVSS v3 を使って計算されるように更新されました。プラグインに CVSS v3 スコアがない場合には、CVSS v2 を使って深刻度が計算されます。深刻度の表示設定は、[設定]のドロップダウンで切り替えができます。

概要

The remote Ubuntu host is missing a security-related patch.

説明

Ryan Sweat discovered that the kernel incorrectly handled certain VLAN packets. On some systems, a remote attacker could send specially crafted traffic to crash the system, leading to a denial of service.
(CVE-2011-1576)

Vasiliy Kulikov and Dan Rosenberg discovered that ecryptfs did not correctly check the origin of mount points. A local attacker could exploit this to trick the system into unmounting arbitrary mount points, leading to a denial of service. (CVE-2011-1833)

Vasiliy Kulikov discovered that taskstats did not enforce access restrictions. A local attacker could exploit this to read certain information, leading to a loss of privacy. (CVE-2011-2494)

Vasiliy Kulikov discovered that /proc/PID/io did not enforce access restrictions. A local attacker could exploit this to read certain information, leading to a loss of privacy. (CVE-2011-2495)

Dan Rosenberg discovered that the Bluetooth stack incorrectly handled certain L2CAP requests. If a system was using Bluetooth, a remote attacker could send specially crafted traffic to crash the system or gain root privileges. (CVE-2011-2497)

It was discovered that the EXT4 filesystem contained multiple off-by-one flaws. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-2695)

Fernando Gont discovered that the IPv6 stack used predictable fragment identification numbers. A remote attacker could exploit this to exhaust network resources, leading to a denial of service.
(CVE-2011-2699)

Christian Ohm discovered that the perf command looks for configuration files in the current directory. If a privileged user were tricked into running perf in a directory containing a malicious configuration file, an attacker could run arbitrary commands and possibly gain privileges.
(CVE-2011-2905)

Time Warns discovered that long symlinks were incorrectly handled on Be filesystems. A local attacker could exploit this with a malformed Be filesystem and crash the system, leading to a denial of service.
(CVE-2011-2928)

Dan Kaminsky discovered that the kernel incorrectly handled random sequence number generation. An attacker could use this flaw to possibly predict sequence numbers and inject packets. (CVE-2011-3188)

Darren Lavender discovered that the CIFS client incorrectly handled certain large values. A remote attacker with a malicious server could exploit this to crash the system or possibly execute arbitrary code as the root user. (CVE-2011-3191)

Han-Wen Nienhuys reported a flaw in the FUSE kernel module. A local user who can mount a FUSE file system could cause a denial of service.
(CVE-2011-3353)

Gideon Naim discovered a flaw in the Linux kernel's handling VLAN 0 frames. An attacker on the local network could exploit this flaw to cause a denial of service. (CVE-2011-3593).

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

ソリューション

Update the affected linux-image-2.6-ec2 package.

関連情報

https://usn.ubuntu.com/1239-1/

プラグインの詳細

深刻度: Critical

ID: 56638

ファイル名: ubuntu_USN-1239-1.nasl

バージョン: 1.10

タイプ: local

エージェント: unix

公開日: 2011/10/26

更新日: 2019/9/19

依存関係: ssh_get_info.nasl, linux_alt_patch_detect.nasl

リスク情報

VPR

リスクファクター: Medium

スコア: 5.9

CVSS v2

リスクファクター: Critical

Base Score: 10

ベクトル: AV:N/AC:L/Au:N/C:C/I:C/A:C

脆弱性情報

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-2.6-ec2, cpe:/o:canonical:ubuntu_linux:10.04:-:lts

必要な KB アイテム: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

パッチ公開日: 2011/10/25

脆弱性公開日: 2011/7/28

参照情報

CVE: CVE-2011-1576, CVE-2011-1833, CVE-2011-2494, CVE-2011-2495, CVE-2011-2497, CVE-2011-2695, CVE-2011-2699, CVE-2011-2905, CVE-2011-2928, CVE-2011-3188, CVE-2011-3191, CVE-2011-3353, CVE-2011-3593

USN: 1239-1