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CVE-2011-0492

19
FAUCET Score

CVE-2011-0492 describes a denial-of-service vulnerability affecting Tor versions prior to 0.2.1.29 and 0.2.2.21-alpha. Remote attackers can trigger an assertion failure and daemon exit by providing specific "blobs" that cause a certain file size, particularly within the cached-descriptors.new file. This vulnerability has a CVSS score of 5.0, indicating a medium severity. It is easily exploitable over the network with low attack complexity and requires no authentication, leading to a partial availability impact. There is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. The vulnerability has received minimal community discussion and media coverage, suggesting low public attention.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.2.1.28CPE matchmatch criteria
cpe:2.3:a:tor:tor:*:*:*:*:*:*:*:*
0.0.2CPE matchmatch criteria
cpe:2.3:a:tor:tor:0.0.2:*:*:*:*:*:*:*
0.0.2_pre13CPE matchmatch criteria
cpe:2.3:a:tor:tor:0.0.2_pre13:*:*:*:*:*:*:*
0.0.2_pre14CPE matchmatch criteria
cpe:2.3:a:tor:tor:0.0.2_pre14:*:*:*:*:*:*:*
0.0.2_pre15CPE matchmatch criteria
cpe:2.3:a:tor:tor:0.0.2_pre15:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.52%
Probability of exploitation in next 30 days
EPSS Percentile
83.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0252 is in the 75th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

archives.seul.org / or/announce/Jan-2011/msg00000.html
blog.torproject.org / blog/tor-02129-released-security-patches
Patch
exchange.xforce.ibmcloud.com / vulnerabilities/64867
gitweb.torproject.org / tor.git/blob/refs/heads/release-0.2.2:/ChangeLog
Patch
trac.torproject.org / projects/tor/ticket/2326
Patch
securityfocus.com / bid/45953