CVE-2012-3518

The networkstatus_parse_vote_from_string function in routerparse.c in Tor before 0.2.2.38 does not properly handle an invalid flavor name, which allows remote attackers to cause a denial of service (out-of-bounds read and daemon crash) via a crafted (1) vote document or (2) consensus document.

Published: 2012-08-26 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2012-3518 is rated Moderate Risk (47.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.46%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2012-3518

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 1.36% 1.46% +0.10%
2 2025-03-29 1.46% 1.36% -0.10%
3 2025-03-17 — 1.46% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2012-3518

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2012-3518

OS Trackers for CVE-2012-3518

vendor priority summary link
debian low CVE-2012-3518 low priority: Debian including 1 source packages (tor), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2012-3518
gentoo normal CVE-2012-3518: 1 GLSA(s) (201301-03), 1 atom(s) (net-misc/tor); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2012-3518
ubuntu low CVE-2012-3518 low priority: Ubuntu including 1 source packages (tor), 16 status rows across 16 suites (hardy, lucid, natty, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): released 11, ignored 4, DNE 1. https://ubuntu.com/security/CVE-2012-3518

Affected software / configurations for CVE-2012-3518

Vendor Product Version Raw CPE
tor tor <= 0.2.2.37 cpe:2.3:a:tor:tor:*:*:*:*:*:*:*:*

References for CVE-2012-3518

cvelogic Threat Intelligence