|Title||tor security update|
|Name||DSA-2363||First vendor Publication||2011-12-16|
|Vendor||Debian||Last vendor Modification||2011-12-16|
Security-Database Scoring CVSS v2
|Cvss vector : (AV:N/AC:H/Au:N/C:C/I:C/A:C)|
|Cvss Base Score||7.6||Attack Range||Network|
|Cvss Impact Score||10||Attack Complexity||High|
|Cvss Expoit Score||4.9||Authentication||None Required|
|Calculate full CVSS 2.0 Vectors scores|
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.
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.
For the unstable and testing distributions, this problem has been fixed in version 0.2.2.35-1.
For the experimental distribution, this problem has has fixed in version 0.2.3.10-alpha-1.
We recommend that you upgrade your tor packages.
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.
|Url : http://www.debian.org/security/2011/dsa-2363|
CWE : Common Weakness Enumeration
|CWE-119||Failure to Constrain Operations within the Bounds of a Memory Buffer|
CPE : Common Platform Enumeration
|2012-04-02||Name : Fedora Update for tor FEDORA-2011-17248|
File : nvt/gb_fedora_2011_17248_tor_fc16.nasl
|2012-02-12||Name : Gentoo Security Advisory GLSA 201201-12 (Tor)|
File : nvt/glsa_201201_12.nasl
|2012-02-11||Name : Debian Security Advisory DSA 2263-2 (movabletype-opensource)|
File : nvt/deb_2263_2.nasl
|2012-02-11||Name : Debian Security Advisory DSA 2363-1 (tor)|
File : nvt/deb_2363_1.nasl
Open Source Vulnerability Database (OSVDB)
|77947||Tor or/buffers.c buf_pullup() Function Data Repacking Remote Overflow|