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CVE-2011-0427

24
FAUCET Score

CVE-2011-0427 describes a heap-based buffer overflow vulnerability affecting Tor versions prior to 0.2.1.29 and 0.2.2.21-alpha. This flaw allows remote attackers to trigger a denial of service through memory corruption and application crashes, with the potential for arbitrary code execution. The vulnerability has a CVSS score of 6.8, indicating a medium severity, and can be exploited remotely with medium attack complexity, potentially leading to partial confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

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

6.8MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.44%
Probability of exploitation in next 30 days
EPSS Percentile
90.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0444 is in the 88th percentile among its peer group of 19,956 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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
Patch
blog.torproject.org / blog/tor-02129-released-security-patches
PatchVendor Advisory
secunia.com / advisories/42905
Vendor Advisory
secunia.com / advisories/42907
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/64748
gitweb.torproject.org / tor.git/blob/refs/heads/release-0.2.2:/ChangeLog
Patch
debian.org / security/2011/dsa-2148
securityfocus.com / bid/45832
securitytracker.com / id
vupen.com / english/advisories/2011/0131
Vendor Advisory
vupen.com / english/advisories/2011/0132
Vendor Advisory