Debian DSA-1809-1 : linux-2.6 - denial of service, privilege escalation

High Nessus Plugin ID 38990

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. The Common Vulnerabilities and Exposures project identifies the following problems :

- CVE-2009-1630 Frank Filz discovered that local users may be able to execute files without execute permission when accessed via an nfs4 mount.

- CVE-2009-1633 Jeff Layton and Suresh Jayaraman fixed several buffer overflows in the CIFS filesystem which allow remote servers to cause memory corruption.

- CVE-2009-1758 Jan Beulich discovered an issue in Xen where local guest users may cause a denial of service (oops).

This update also fixes a regression introduced by the fix for CVE-2009-1184 in 2.6.26-15lenny3. This prevents a boot time panic on systems with SELinux enabled.

Solution

Upgrade the linux-2.6 and user-mode-linux packages.

For the oldstable distribution (etch), these problems, where applicable, will be fixed in future updates to linux-2.6 and linux-2.6.24.

For the stable distribution (lenny), these problems have been fixed in version 2.6.26-15lenny3.

Note: Debian carefully tracks all known security issues across every linux kernel package in all releases under active security support.
However, given the high frequency at which low-severity security issues are discovered in the kernel and the resource requirements of doing an update, updates for lower priority issues will normally not be released for all kernels at the same time. Rather, they will be released in a staggered or 'leap-frog' fashion.

See Also

https://security-tracker.debian.org/tracker/CVE-2009-1630

https://security-tracker.debian.org/tracker/CVE-2009-1633

https://security-tracker.debian.org/tracker/CVE-2009-1758

https://security-tracker.debian.org/tracker/CVE-2009-1184

https://www.debian.org/security/2009/dsa-1809

Plugin Details

Severity: High

ID: 38990

File Name: debian_DSA-1809.nasl

Version: 1.12

Type: local

Agent: unix

Published: 2009/06/03

Updated: 2018/11/10

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.1

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:linux-2.6, cpe:/o:debian:debian_linux:5.0

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

Patch Publication Date: 2009/06/01

Reference Information

CVE: CVE-2009-1630, CVE-2009-1633, CVE-2009-1758

DSA: 1809

CWE: 119, 264, 399