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Vulnerability record · CVE-2011-1924 · published 14 June 2011

CVE-2011-1924: Tor memory buffer overflow vulnerability

Tor · Tor

Buffer overflow in the policy_summarize function in or/policies.c in Tor before 0.2.1.30 allows remote attackers to cause a denial of service (directory authority crash) via a crafted policy that triggers creation of a long port list.

5.0 CVSS 2.0 Medium EPSS 2.8% · top 13.9% CWE-119 · Memory buffer overflow
5.0CVSS 2.0 base score
2.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
16References
16 Jun 2026Last modified by NVD

Description

Buffer overflow in the policy_summarize function in or/policies.c in Tor before 0.2.1.30 allows remote attackers to cause a denial of service (directory authority crash) via a crafted policy that triggers creation of a long port list.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061258.html
http://secunia.com/advisories/43548 Vendor Advisory
http://secunia.com/advisories/44862 Vendor Advisory
http://www.securityfocus.com/bid/46618
https://bugzilla.redhat.com/show_bug.cgi?id=705192 Patch
https://bugzilla.redhat.com/show_bug.cgi?id=705194
https://gitweb.torproject.org/tor.git/commit/43414eb98821d3b5c6c65181d7545ce938f82c8e Patch
https://lists.torproject.org/pipermail/tor-announce/2011-February/000000.html Patch
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061258.html
http://secunia.com/advisories/43548 Vendor Advisory
http://secunia.com/advisories/44862 Vendor Advisory
http://www.securityfocus.com/bid/46618
https://bugzilla.redhat.com/show_bug.cgi?id=705192 Patch
https://bugzilla.redhat.com/show_bug.cgi?id=705194
https://gitweb.torproject.org/tor.git/commit/43414eb98821d3b5c6c65181d7545ce938f82c8e Patch
https://lists.torproject.org/pipermail/tor-announce/2011-February/000000.html Patch

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2011-1924), CISA KEV, FIRST EPSS (scores of 2026-10-01). This page is refreshed as NVD updates the record.