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CVE-2012-4922

19
FAUCET Score

CVE-2012-4922 describes a denial-of-service vulnerability in Tor versions before 0.2.2.39 and 0.2.3.x before 0.2.3.22-rc, where improper validation of time values in the tor_timegm function allows remote attackers to crash the Tor daemon via a malformed directory object. This vulnerability has a CVSS score of 5.0, indicating a medium severity with a network attack vector, low complexity, and potential for partial availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.2.2.38CPE matchmatch criteria
cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
0.0.2CPE matchmatch criteria
cpe:2.3:a:torproject:tor:0.0.2:*:*:*:*:*:*:*
0.0.2CPE matchmatch criteria
cpe:2.3:a:torproject:tor:0.0.2:pre13:*:*:*:*:*:*
0.0.2CPE matchmatch criteria
cpe:2.3:a:torproject:tor:0.0.2:pre14:*:*:*:*:*:*
0.0.2CPE matchmatch criteria
cpe:2.3:a:torproject: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
2.23%
Probability of exploitation in next 30 days
EPSS Percentile
80.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0223 is in the 71st percentile among its peer group of 23,701 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

lists.fedoraproject.org / pipermail/package-announce/2012-September/088006.html
lists.opensuse.org / opensuse-updates/2012-10/msg00005.html
openwall.com / lists/oss-security/2012/09/12/5
security.gentoo.org / glsa/glsa-201301-03.xml
gitweb.torproject.org / tor.git/blob/release-0.2.2:/ReleaseNotes
gitweb.torproject.org / tor.git/commit/973c18bf0e84d14d8006a9ae97fde7f7fb97e404
lists.torproject.org / pipermail/tor-talk/2012-September/025501.html
trac.torproject.org / projects/tor/ticket/6811