PT-2011-2390 · Tor · Tor

Debuger · Published 2011-01-19 · Updated 2017-08-17 · CVE-2011-0491

Positive Technologies (AI Summary)

CVSS v2.0

5.0

Medium

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Name of the Vulnerable Software and Affected Versions Tor versions prior to 0.2.1.29 Tor versions 0.2.2.x prior to 0.2.2.21-alpha

Description The issue is related to the tor realloc function, which does not validate a certain size value during memory allocation. This could allow remote attackers to cause a denial of service, resulting in a daemon crash, via unspecified vectors. The problem is related to underflow errors.

Recommendations For Tor versions prior to 0.2.1.29, update to version 0.2.1.29 or later. For Tor versions 0.2.2.x prior to 0.2.2.21-alpha, update to version 0.2.2.21-alpha or later.

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2011-0491

DSA-2148-1

Affected Products

Tor

References · 11

• https://security-tracker.debian.org/tracker/CVE-2011-0491 · Vendor Advisory
• http://archives.seul.org/or/announce/Jan-2011/msg00000.html · Patch
• https://gitweb.torproject.org/tor.git/blob/refs/heads/release-0.2.2:/ChangeLog · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2011-0491 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2011-0491 · Security Note
• https://osv.dev/vulnerability/CVE-2011-0491 · Vendor Advisory
• http://blog.torproject.org/blog/tor-02129-released-security-patches · Vendor Advisory
• https://trac.torproject.org/projects/tor/ticket/2324 · Note
• http://xforce.iss.net/xforce/xfdb/64888 · Note
• http://securityfocus.com/bid/45953 · Note
• https://exchange.xforce.ibmcloud.com/vulnerabilities/64888 · Note