CentOS 5 : kernel (CESA-2011:1386)

critical Nessus プラグイン ID 56569
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 CentOS host is missing one or more security updates.

説明

Updated kernel packages that fix multiple security issues, several bugs, and add one enhancement are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security fixes :

* The maximum file offset handling for ext4 file systems could allow a local, unprivileged user to cause a denial of service. (CVE-2011-2695, Important)

* IPv6 fragment identification value generation could allow a remote attacker to disrupt a target system's networking, preventing legitimate users from accessing its services. (CVE-2011-2699, Important)

* A malicious CIFS (Common Internet File System) server could send a specially crafted response to a directory read request that would result in a denial of service or privilege escalation on a system that has a CIFS share mounted. (CVE-2011-3191, Important)

* A local attacker could use mount.ecryptfs_private to mount (and then access) a directory they would otherwise not have access to. Note: To correct this issue, the RHSA-2011:1241 ecryptfs-utils update must also be installed. (CVE-2011-1833, Moderate)

* A flaw in the taskstats subsystem could allow a local, unprivileged user to cause excessive CPU time and memory use. (CVE-2011-2484, Moderate)

* Mapping expansion handling could allow a local, unprivileged user to cause a denial of service. (CVE-2011-2496, Moderate)

* GRO (Generic Receive Offload) fields could be left in an inconsistent state. An attacker on the local network could use this flaw to cause a denial of service. GRO is enabled by default in all network drivers that support it. (CVE-2011-2723, Moderate)

* RHSA-2011:1065 introduced a regression in the Ethernet bridge implementation. If a system had an interface in a bridge, and an attacker on the local network could send packets to that interface, they could cause a denial of service on that system. Xen hypervisor and KVM (Kernel-based Virtual Machine) hosts often deploy bridge interfaces. (CVE-2011-2942, Moderate)

* A flaw in the Xen hypervisor IOMMU error handling implementation could allow a privileged guest user, within a guest operating system that has direct control of a PCI device, to cause performance degradation on the host and possibly cause it to hang. (CVE-2011-3131, Moderate)

* IPv4 and IPv6 protocol sequence number and fragment ID generation could allow a man-in-the-middle attacker to inject packets and possibly hijack connections. Protocol sequence number and fragment IDs are now more random. (CVE-2011-3188, Moderate)

* A flaw in the kernel's clock implementation could allow a local, unprivileged user to cause a denial of service. (CVE-2011-3209, Moderate)

* Non-member VLAN (virtual LAN) packet handling for interfaces in promiscuous mode and also using the be2net driver could allow an attacker on the local network to cause a denial of service.
(CVE-2011-3347, Moderate)

* A flaw in the auerswald USB driver could allow a local, unprivileged user to cause a denial of service or escalate their privileges by inserting a specially crafted USB device. (CVE-2009-4067, Low)

* A flaw in the Trusted Platform Module (TPM) implementation could allow a local, unprivileged user to leak information to user space.
(CVE-2011-1160, Low)

* A local, unprivileged user could possibly mount a CIFS share that requires authentication without knowing the correct password if the mount was already mounted by another local user. (CVE-2011-1585, Low)

Red Hat would like to thank Fernando Gont for reporting CVE-2011-2699;
Darren Lavender for reporting CVE-2011-3191; the Ubuntu Security Team for reporting CVE-2011-1833; Vasiliy Kulikov of Openwall for reporting CVE-2011-2484; Robert Swiecki for reporting CVE-2011-2496; Brent Meshier for reporting CVE-2011-2723; Dan Kaminsky for reporting CVE-2011-3188; Yasuaki Ishimatsu for reporting CVE-2011-3209; Somnath Kotur for reporting CVE-2011-3347; Rafael Dominguez Vega for reporting CVE-2009-4067; and Peter Huewe for reporting CVE-2011-1160. The Ubuntu Security Team acknowledges Vasiliy Kulikov of Openwall and Dan Rosenberg as the original reporters of CVE-2011-1833.

ソリューション

Update the affected kernel packages.

関連情報

http://www.nessus.org/u?6431a9c4

http://www.nessus.org/u?d39b4721

プラグインの詳細

深刻度: Critical

ID: 56569

ファイル名: centos_RHSA-2011-1386.nasl

バージョン: 1.15

タイプ: local

エージェント: unix

公開日: 2011/10/21

更新日: 2021/1/4

依存関係: ssh_get_info.nasl

リスク情報

VPR

リスクファクター: Medium

スコア: 6.7

CVSS v2

リスクファクター: Critical

Base Score: 10

Temporal Score: 7.4

ベクトル: AV:N/AC:L/Au:N/C:C/I:C/A:C

現状ベクトル: E:U/RL:OF/RC:C

脆弱性情報

CPE: p-cpe:/a:centos:centos:kernel, p-cpe:/a:centos:centos:kernel-PAE, p-cpe:/a:centos:centos:kernel-PAE-devel, p-cpe:/a:centos:centos:kernel-debug, p-cpe:/a:centos:centos:kernel-debug-devel, p-cpe:/a:centos:centos:kernel-devel, p-cpe:/a:centos:centos:kernel-doc, p-cpe:/a:centos:centos:kernel-headers, p-cpe:/a:centos:centos:kernel-xen, p-cpe:/a:centos:centos:kernel-xen-devel, cpe:/o:centos:centos:5

必要な KB アイテム: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list

エクスプロイトの容易さ: No known exploits are available

パッチ公開日: 2011/10/20

脆弱性公開日: 2011/6/24

参照情報

CVE: CVE-2009-4067, CVE-2011-1160, CVE-2011-1585, CVE-2011-1833, CVE-2011-2484, CVE-2011-2496, CVE-2011-2695, CVE-2011-2699, CVE-2011-2723, CVE-2011-2942, CVE-2011-3131, CVE-2011-3188, CVE-2011-3191, CVE-2011-3209, CVE-2011-3347

BID: 46866, 47321, 47381, 48383, 48687, 48697, 48802, 48929, 49108, 49146, 49289, 49295, 50312, 50313

RHSA: 2011:1386