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Debian DLA-246-2 : linux-2.6 regression update

high Nessus Plugin ID 84252

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Synopsis

The remote Debian host is missing a security update.

Description

The linux-2.6 update issued as DLA-246-1 caused regressions. This update corrects the defective patches applied in that update causing these problems. For reference the original advisory text follows.

This update fixes the CVEs described below.

CVE-2011-5321

Jiri Slaby discovered that tty_driver_lookup_tty() may leak a reference to the tty driver. A local user could use this flaw to crash the system.

CVE-2012-6689

Pablo Neira Ayuso discovered that non-root user-space processes can send forged Netlink notifications to other processes. A local user could use this flaw for denial of service or privilege escalation.

CVE-2014-3184

Ben Hawkes discovered that various HID drivers may over-read the report descriptor buffer, possibly resulting in a crash if a HID with a crafted descriptor is plugged in.

CVE-2014-8159

It was found that the Linux kernel's InfiniBand/RDMA subsystem did not properly sanitize input parameters while registering memory regions from user space via the (u)verbs API. A local user with access to a /dev/infiniband/uverbsX device could use this flaw to crash the system or, potentially, escalate their privileges on the system.

CVE-2014-9683

Dmitry Chernenkov discovered that eCryptfs writes past the end of the allocated buffer during encrypted filename decoding, resulting in local denial of service.

CVE-2014-9728 / CVE-2014-9729 / CVE-2014-9730 / CVE-2014-9731 / CVE-2015-4167

Carl Henrik Lunde discovered that the UDF implementation is missing several necessary length checks. A local user that can mount devices could use these various flaws to crash the system, to leak information from the kernel, or possibly for privilege escalation.

CVE-2015-1805

Red Hat discovered that the pipe iovec read and write implementations may iterate over the iovec twice but will modify the iovec such that the second iteration accesses the wrong memory. A local user could use this flaw to crash the system or possibly for privilege escalation.
This may also result in data corruption and information leaks in pipes between non-malicious processes.

CVE-2015-2041

Sasha Levin discovered that the LLC subsystem exposed some variables as sysctls with the wrong type. On a 64-bit kernel, this possibly allows privilege escalation from a process with CAP_NET_ADMIN capability; it also results in a trivial information leak.

CVE-2015-2042

Sasha Levin discovered that the RDS subsystem exposed some variables as sysctls with the wrong type. On a 64-bit kernel, this results in a trivial information leak.

CVE-2015-2830

Andrew Lutomirski discovered that when a 64-bit task on an amd64 kernel makes a fork(2) or clone(2) system call using int $0x80, the 32-bit compatibility flag is set (correctly) but is not cleared on return. As a result, both seccomp and audit will misinterpret the following system call by the task(s), possibly leading to a violation of security policy.

CVE-2015-2922

Modio AB discovered that the IPv6 subsystem would process a router advertisement that specifies no route but only a hop limit, which would then be applied to the interface that received it. This can result in loss of IPv6 connectivity beyond the local network.

This may be mitigated by disabling processing of IPv6 router advertisements if they are not needed: sysctl net.ipv6.conf.default.accept_ra=0 sysctl net.ipv6.conf.<interface>.accept_ra=0

CVE-2015-3339

It was found that the execve(2) system call can race with inode attribute changes made by chown(2). Although chown(2) clears the setuid/setgid bits of a file if it changes the respective owner ID, this race condition could result in execve(2) setting effective uid/gid to the new owner ID, a privilege escalation.

For the oldoldstable distribution (squeeze), these problems have been fixed in version 2.6.32-48squeeze12.

For the oldstable distribution (wheezy), these problems were fixed in linux version 3.2.68-1+deb7u1 or earlier, except for CVE-2015-1805 and CVE-2015-4167 which will be fixed soon.

For the stable distribution (jessie), these problems were fixed in linux version 3.16.7-ckt11-1 or earlier, except for CVE-2015-4167 which will be fixed later.

We recommend that you upgrade your linux-2.6 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.

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2015/06/msg00012.html

https://packages.debian.org/source/squeeze-lts/linux-2.6

Plugin Details

Severity: High

ID: 84252

File Name: debian_DLA-246.nasl

Version: 2.15

Type: local

Agent: unix

Published: 6/18/2015

Updated: 1/11/2021

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-openvz-amd64, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-486, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-common-xen, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-vserver-686-bigmem, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-common, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-xen-686, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-vserver-amd64, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-all, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-amd64-dbg, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-vserver-amd64-dbg, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-openvz-amd64, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-686, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-xen-686-dbg, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-openvz-686, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-vserver-amd64, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-486, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-686, p-cpe:/a:debian:debian_linux:linux-doc-2.6.32, p-cpe:/a:debian:debian_linux:linux-patch-debian-2.6.32, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-vserver-686, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-686-bigmem-dbg, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-all-amd64, p-cpe:/a:debian:debian_linux:xen-linux-system-2.6.32-5-xen-686, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-openvz-amd64-dbg, p-cpe:/a:debian:debian_linux:linux-source-2.6.32, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-xen-amd64, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-xen-amd64, cpe:/o:debian:debian_linux:6.0, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-all-i386, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-common-openvz, p-cpe:/a:debian:debian_linux:linux-libc-dev, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-vserver-686-bigmem, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-amd64, p-cpe:/a:debian:debian_linux:linux-support-2.6.32-5, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-amd64, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-686-bigmem, p-cpe:/a:debian:debian_linux:firmware-linux-free, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-openvz-686-dbg, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-xen-686, p-cpe:/a:debian:debian_linux:linux-tools-2.6.32, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-686-bigmem, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-openvz-686, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-vserver-686, p-cpe:/a:debian:debian_linux:linux-manual-2.6.32, p-cpe:/a:debian:debian_linux:linux-base, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-xen-amd64-dbg, p-cpe:/a:debian:debian_linux:xen-linux-system-2.6.32-5-xen-amd64, p-cpe:/a:debian:debian_linux:linux-image-2.6.32-5-vserver-686-bigmem-dbg, p-cpe:/a:debian:debian_linux:linux-headers-2.6.32-5-common-vserver

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/17/2015

Vulnerability Publication Date: 9/28/2014

Reference Information

CVE: CVE-2011-5321, CVE-2012-6689, CVE-2014-3184, CVE-2014-8159, CVE-2014-9683, CVE-2014-9728, CVE-2014-9729, CVE-2014-9730, CVE-2014-9731, CVE-2015-1805, CVE-2015-2041, CVE-2015-2042, CVE-2015-2830, CVE-2015-2922, CVE-2015-3339, CVE-2015-4167

BID: 69768, 72643, 72729, 72730, 72739, 73060, 73141, 73699, 74243, 74315, 74951, 74963, 74964, 75001