Tor before 0.2.1.29 and 0.2.2.x before 0.2.2.21-alpha allows remote attackers to cause a denial of service (assertion failure and daemon exit) via blobs that trigger a certain file size, as demonstrated by the cached-descriptors.new file.

The remote host is affected by the vulnerability described in GLSA-201110-13 (Tor: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Tor. Please review the       CVE identifiers referenced below for details.
  Impact :

    A remote unauthenticated attacker may be able to execute arbitrary code       with the privileges of the Tor process or create a Denial of Service.
  Workaround :

    There is no known workaround at this time.

- Mon Jan 17 2011 Enrico Scholz <enrico.scholz at     informatik.tu-chemnitz.de> - 0.2.1.29-1300

    - updated to 0.2.1.29 (SECURITY)

    - CVE-2011-0427: heap overflow bug, potential remote       code execution

    - Tue Dec 21 2010 Luke Macken <lmacken at redhat.com> -       0.2.1.28-1300

    - updated to 0.2.1.28 (SECURITY: fixes a remotely       exploitable heap overflow bug)

    - Fri Nov 26 2010 Enrico Scholz <enrico.scholz at       informatik.tu-chemnitz.de> - 0.2.1.27-1300

    - updated to 0.2.1.27

    - work around broken chkconfig by adding dummy       Default-Start: in -lsb (#647512)

    - Fri Nov 26 2010 Enrico Scholz <enrico.scholz at       informatik.tu-chemnitz.de>

    - fixed 'limit' statement in upstart script

    - Tue Jun 1 2010 Enrico Scholz <enrico.scholz at       informatik.tu-chemnitz.de> - 0.2.1.26-1300

    - updated to 0.2.1.26

    - removed workaround to install lsb initscript because       parts of the underlying problem have been fixed in       redhat-lsb and the remaining ones were solved by       previous commit

  - Tue Jun 1 2010 Enrico Scholz <enrico.scholz at     informatik.tu-chemnitz.de> - 0.2.1.25-1301

    - removed $local_fs dependency in -lsb initscript to       workaround buggy redhat-lsb; $remote_fs should imply       it

  - Thu Mar 18 2010 Enrico Scholz <enrico.scholz at     informatik.tu-chemnitz.de> - 0.2.1.25-1300

    - updated to 0.2.1.25

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

- Mon Jan 17 2011 Enrico Scholz <enrico.scholz at     informatik.tu-chemnitz.de> - 0.2.1.29-1400

    - updated to 0.2.1.29 (SECURITY)

    - CVE-2011-0427: heap overflow bug, potential remote       code execution

    - Tue Dec 21 2010 Luke Macken <lmacken at redhat.com> -       0.2.1.28-1400

    - updated to 0.2.1.28 (SECURITY: fixes a remotely       exploitable heap overflow bug)

    - Fri Nov 26 2010 Enrico Scholz <enrico.scholz at       informatik.tu-chemnitz.de> - 0.2.1.27-1400

    - updated to 0.2.1.27

    - work around broken chkconfig by adding dummy       Default-Start: in -lsb (#647512)

    - Fri Nov 26 2010 Enrico Scholz <enrico.scholz at       informatik.tu-chemnitz.de> - 0.2.1.26-1401

    - fixed 'limit' statement in upstart script

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
56549	GLSA-201110-13 : Tor: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	medium
55002	Fedora 13 : tor-0.2.1.29-1300.fc13 (2011-0650)	Nessus	Fedora Local Security Checks	medium
53901	Fedora 14 : tor-0.2.1.29-1400.fc14 (2011-0642)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2011-0492

high

Tenable Plugins

medium

medium

medium