VULNERABILITY INTELLIGENCE

CVE-2011-0491

CVSS score5 MEDIUM
EPSS probability2.52%
CISA KEVNot currently listed
Published2011-01-19
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:N/I:N/A:P

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."

Weakness classification

  • CWE-20: Improper Input Validation

Primary references