CVE-2011-0491 — Improper Input Validation in TOR

CWE-20 — Improper Input Validation7 documents6 sources
Severity
5.0MEDIUMNVD
EPSS
1.4%
top 19.68%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Torproject TORTOR
Timeline
PublishedJan 19
Latest updateMay 17

Description

The tor_realloc function in Tor before 0.2.1.29 and 0.2.2.x before 0.2.2.21-alpha does not validate a certain size value during memory allocation, which might allow remote attackers to cause a denial of service (daemon crash) via unspecified vectors, related to "underflow errors."

CVSS vector

AV:N/AC:L/C:N/I:N/A:PExploitability: 10.0 | Impact: 2.9

Affected Packages2 packages

▶Debiantorproject/tor< 0.2.1.29-1+3
▶NVDtor/tor0.2.1.28+185

Patches

Patch: archives.seul.org ↗Patch: blog.torproject.org ↗Patch: gitweb.torproject.org ↗

🔴Vulnerability Details

3
GHSA
GHSA-gv9p-397w-xfq9: The tor_realloc function in Tor before 0↗2022-05-17
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CVEList
CVE-2011-0491: The tor_realloc function in Tor before 0↗2011-01-19
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OSV
CVE-2011-0491: The tor_realloc function in Tor before 0↗2011-01-19
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📋Vendor Advisories

1
Debian
CVE-2011-0491: tor - The tor_realloc function in Tor before 0.2.1.29 and 0.2.2.x before 0.2.2.21-alph...↗2011
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💬Community

2
Bugzilla
CVE-2011-0015 CVE-2011-0016 CVE-2011-0427 CVE-2011-0490 CVE-2011-0491 CVE-2011-0492 CVE-2011-0493 tor: multiple security flaws fixed in 0.2.1.29↗2011-01-20
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Bugzilla
CVE-2011-0015 CVE-2011-0016 CVE-2011-0427 CVE-2011-0490 CVE-2011-0491 CVE-2011-0492 CVE-2011-0493 CVE-2010-1676 CVE-2010-0383 CVE-2010-0385 tor various flaws [epel-5]↗2011-01-20
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CVE-2011-0491 — Improper Input Validation in TOR | cvebase