Debian DSA-2992-1 : linux - security update

High Nessus Plugin ID 76884

Synopsis

The remote Debian host is missing a security-related update.

Description

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

- CVE-2014-3534 Martin Schwidefsky of IBM discovered that the ptrace subsystem does not properly sanitize the psw mask value.
On s390 systems, an unprivileged local user could use this flaw to set address space control bits to kernel space combination and thus gain read/write access to kernel memory.

- CVE-2014-4667 Gopal Reddy Kodudula of Nokia Siemens Networks discovered that the sctp_association_free function does not properly manage a certain backlog value, which allows remote attackers to cause a denial of service (socket outage) via a crafted SCTP packet.

- CVE-2014-4943 Sasha Levin discovered a flaw in the Linux kernel's point-to-point protocol (PPP) when used with the Layer Two Tunneling Protocol (L2TP). An unprivileged local user could use this flaw for privilege escalation.

Solution

Upgrade the linux packages.

For the stable distribution (wheezy), these problems have been fixed in version 3.2.60-1+deb7u3.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=728705

https://security-tracker.debian.org/tracker/CVE-2014-3534

https://security-tracker.debian.org/tracker/CVE-2014-4667

https://security-tracker.debian.org/tracker/CVE-2014-4943

https://www.debian.org/security/2014/dsa-2992

Plugin Details

Severity: High

ID: 76884

File Name: debian_DSA-2992.nasl

Version: 1.9

Type: local

Agent: unix

Published: 2014/07/30

Updated: 2019/07/15

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

Temporal Score: 5.6

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

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:linux, cpe:/o:debian:debian_linux:7.0

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: 2014/07/29

Vulnerability Publication Date: 2014/07/03

Exploitable With

CANVAS (CANVAS)

Reference Information

CVE: CVE-2014-3534, CVE-2014-4667, CVE-2014-4943

BID: 68224, 68683

DSA: 2992