Detections
Analytics
Debian DSA-2363-1 : tor - buffer overflow
high Nessus Plugin ID 57503
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Synopsis
The remote Debian host is missing a security-related update.Description
It was discovered that Tor, an online privacy tool, incorrectly computes buffer sizes in certain cases involving SOCKS connections.Malicious parties could use this to cause a heap-based buffer overflow, potentially allowing execution of arbitrary code.
In Tor's default configuration this issue can only be triggered by clients that can connect to Tor's SOCKS port, which listens only on localhost by default.
In non-default configurations where Tor's SocksPort listens not only on localhost or where Tor was configured to use another SOCKS server for all of its outgoing connections, Tor is vulnerable to a larger set of malicious parties.
Solution
Upgrade the tor packages.For the oldstable distribution (lenny), this problem has been fixed in version 0.2.1.32-1.
For the stable distribution (squeeze), this problem has been fixed in version 0.2.2.35-1~squeeze+1.
Please note that the update for stable (squeeze) updates this package from 0.2.1.31 to 0.2.2.35, a new major release of Tor, as upstream has announced end-of-life for the 0.2.1.x tree for the near future. Please check your Tor runs as expected after the upgrade.
See Also
Plugin Details
Severity: High
ID: 57503
File Name: debian_DSA-2363.nasl
Version: 1.8
Type: local
Agent: unix
Family: Debian Local Security Checks
Published: 1/12/2012
Updated: 1/11/2021
Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.9
CVSS v2
Risk Factor: High
Base Score: 7.6
Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C
Vulnerability Information
CPE: p-cpe:/a:debian:debian_linux:tor, cpe:/o:debian:debian_linux:5.0, cpe:/o:debian:debian_linux:6.0
Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l
Patch Publication Date: 12/16/2011
Reference Information
CVE: CVE-2011-2778
DSA: 2363