77947 : Tor or/buffers.c buf_pullup() Function Data Repacking Remote Overflow
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Timeline

Disclosure Date
2011-12-16

Description

<em style='font-weight:bold;'>(Description Provided by <a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=2011-2778" target="_blank">CVE</a>)</em> : Multiple heap-based buffer overflows in Tor before 0.2.2.35 allow remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code by (1) establishing a SOCKS connection to SocksPort or (2) leveraging a SOCKS proxy configuration.

Classification

Location: Remote / Network Access
Attack Type: Input Manipulation
Impact: Loss of Integrity
Solution: Upgrade
Exploit: Exploit Unknown
Disclosure: Vendor Verified

Solution

Upgrade to version 0.2.2.35 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

Unknown or Incomplete

References

CVE ID: 2011-2778 (see also: NVD)
Secunia Advisory ID: 47259 47276 47664
Vendor Specific News/Changelog Entry: http://lists.debian.org/debian-security-announce/2011/msg00241.html
http://security.gentoo.org/glsa/glsa-201201-12.xml
https://blog.torproject.org/blog/tor-02235-released-security-patches
https://lists.torproject.org/pipermail/tor-announce/2011-December/000083.html
Other Advisory URL: http://www.debian.org/security/2011/dsa-2363

Credit

Unknown or Incomplete

CVSSv2 Score

CVSSv2 Base Score = 7.6
Source: nvd.nist.gov | Generated: 2011-12-23 | Disagree?

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