Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2011-0491

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
19/01/2011
Last modified:
11/04/2025

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."

Impact

Vector 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:tor:tor:*:*:*:*:*:*:*:* 0.2.1.28 (including)
cpe:2.3:a:tor:tor:0.0.2:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre13:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre14:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre15:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre16:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre17:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre18:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre19:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre20:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre21:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre22:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre23:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre24:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre25:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools