Debian Security Advisory DSA 2743-1 (kfreebsd-9 - privilege escalation/information leak)

Published: 2013-08-26 22:00:00
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:C/I:N/A:N

Affected Versions:
kfreebsd-9 on Debian Linux

Recommendations:
For the stable distribution (wheezy), these problems has been fixed in version 9.0-10+deb70.3. We recommend that you upgrade your kfreebsd-9 Linux Distribution Packages.

Summary:
Several vulnerabilities have been discovered in the FreeBSD kernel that may lead to a privilege escalation or information leak. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2013-3077 Clement Lecigne from the Google Security Team reported an integer overflow in computing the size of a temporary buffer in the IP multicast code, which can result in a buffer which is too small for the requested operation. An unprivileged process can read or write pages of memory which belong to the kernel. These may lead to exposure of sensitive information or allow privilege escalation. CVE-2013-4851 Rick Macklem, Christopher Key and Tim Zingelman reported that the FreeBSD kernel incorrectly uses client supplied credentials instead of the one configured in exports(5) when filling out the anonymous credential for a NFS export, when -network or -host restrictions are used at the same time. The remote client may supply privileged credentials (e.g. the root user) when accessing a file under the NFS share, which will bypass the normal access checks. CVE-2013-5209 Julian Seward and Michael Tuexen reported a kernel memory disclosure when initializing the SCTP state cookie being sent in INIT-ACK chunks, a buffer allocated from the kernel stack is not completely initialized. Fragments of kernel memory may be included in SCTP packets and transmitted over the network. For each SCTP session, there are two separate instances in which a 4-byte fragment may be transmitted. This memory might contain sensitive information, such as portions of the file cache or terminal buffers. This information might be directly useful, or it might be leveraged to obtain elevated privileges in some way. For example, a terminal buffer might include an user-entered password.

Detection Method:
This check tests the installed software version using the apt Linux Distribution Package manager.

Detection Type:
Linux Distribution Package

Solution Type:
Vendor Patch

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2013-5209
https://nvd.nist.gov/vuln/detail/CVE-2013-3077
https://nvd.nist.gov/vuln/detail/CVE-2013-4851

References:

http://www.debian.org/security/2013/dsa-2743.html

Severity
High
CVSS Score
7.8
Published
2013-08-26
Modified
2021-11-24
Category
Debian Local Security Checks

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