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CVE-2011-0491 Details
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."
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No CVSS 3.x data is available for this CVE.
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-20 | Improper Input Validation | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| tor tor | <= 0.2.1.28 0.0.2 0.0.2_pre13 0.0.2_pre14 0.0.2_pre15 0.0.2_pre16 0.0.2_pre17 0.0.2_pre18 0.0.2_pre19 0.0.2_pre20 0.0.2_pre21 0.0.2_pre22 0.0.2_pre23 0.0.2_pre24 0.0.2_pre25 0.0.2_pre26 0.0.2_pre27 0.0.3 0.0.4 0.0.5 0.0.6 0.0.6.1 0.0.6.2 0.0.7 0.0.7.1 0.0.7.2 0.0.7.3 0.0.8 0.0.8.1 0.0.9 0.0.9.1 0.0.9.2 0.0.9.3 0.0.9.4 0.0.9.5 0.0.9.6 0.0.9.7 0.0.9.8 0.0.9.9 0.0.9.10 0.1.0.1 0.1.0.2 0.1.0.3 0.1.0.4 0.1.0.5 0.1.0.6 0.1.0.7 0.1.0.8 0.1.0.9 0.1.0.10 0.1.0.11 0.1.0.12 0.1.0.13 0.1.0.14 0.1.0.15 0.1.0.16 0.1.0.17 0.1.1 0.1.1.1 0.1.1.1 alpha 0.1.1.2 0.1.1.2 alpha 0.1.1.3 0.1.1.3 alpha 0.1.1.4 0.1.1.4 alpha 0.1.1.5 0.1.1.5 alpha 0.1.1.6 0.1.1.6 alpha 0.1.1.7 0.1.1.7 alpha 0.1.1.8 0.1.1.8 alpha 0.1.1.9 0.1.1.9 alpha 0.1.1.10 0.1.1.10 alpha 0.1.1.11 0.1.1.12 0.1.1.13 0.1.1.14 0.1.1.15 0.1.1.16 0.1.1.17 0.1.1.18 0.1.1.19 0.1.1.20 0.1.1.21 0.1.1.22 0.1.1.23 0.1.1.25 0.1.1.26 0.1.2.1 alpha-cvs 0.1.2.2 0.1.2.3 alpha 0.1.2.4 0.1.2.5 0.1.2.5 alpha 0.1.2.6 alpha 0.1.2.7 alpha 0.1.2.8 beta 0.1.2.9 0.1.2.10 0.1.2.11 0.1.2.12 0.1.2.13 0.1.2.14 0.1.2.15 0.1.2.16 0.1.2.17 0.1.2.18 0.1.2.19 0.1.2.30 0.1.2.31 0.2.0.1 alpha 0.2.0.2 alpha 0.2.0.3 alpha 0.2.0.4 alpha 0.2.0.5 alpha 0.2.0.6 alpha 0.2.0.7 alpha 0.2.0.8 alpha 0.2.0.9 alpha 0.2.0.10 alpha 0.2.0.11 alpha 0.2.0.12 alpha 0.2.0.13 alpha 0.2.0.14 alpha 0.2.0.15 alpha 0.2.0.16 alpha 0.2.0.17 alpha 0.2.0.18 alpha 0.2.0.19 alpha 0.2.0.20 alpha 0.2.0.21 alpha 0.2.0.22 alpha 0.2.0.23 alpha 0.2.0.24 alpha 0.2.0.25 alpha 0.2.0.26 alpha 0.2.0.27 alpha 0.2.0.28 alpha 0.2.0.29 0.2.0.29 alpha 0.2.0.30 0.2.0.30 alpha 0.2.0.31 0.2.0.31 alpha 0.2.0.32 alpha 0.2.0.33 0.2.0.34 alpha 0.2.0.35 0.2.1.1 alpha 0.2.1.2 alpha 0.2.1.3 alpha 0.2.1.4 alpha 0.2.1.5 alpha 0.2.1.6 alpha 0.2.1.7 alpha 0.2.1.8 alpha 0.2.1.9 alpha 0.2.1.10 alpha 0.2.1.11 alpha 0.2.1.12 0.2.1.12 alpha 0.2.1.13 0.2.1.14 0.2.1.15 0.2.1.16 0.2.1.17 0.2.1.18 0.2.1.19 0.2.1.20 0.2.1.21 0.2.1.22 0.2.1.23 0.2.1.24 0.2.1.25 0.2.1.26 0.2.1.27 0.2.2.1 0.2.2.1 alpha 0.2.2.2 0.2.2.2 alpha 0.2.2.3 0.2.2.3 alpha 0.2.2.4 0.2.2.4 alpha 0.2.2.5 0.2.2.5 alpha 0.2.2.6 0.2.2.6 alpha 0.2.2.7 alpha 0.2.2.8 alpha 0.2.2.9 alpha 0.2.2.10 alpha 0.2.2.11 alpha 0.2.2.12 alpha 0.2.2.13 alpha 0.2.2.14 alpha 0.2.2.15 alpha 0.2.2.16 alpha 0.2.2.17 alpha 0.2.2.18 alpha 0.2.2.19 alpha 0.2.2.20 alpha |
CPE
Remediation
| |
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 16, 2026 | CVE Modified | [email protected] |
| Apr 29, 2026 | Status Change | [email protected] |
| Nov 21, 2024 | CVE Modified | CVE |
| May 14, 2024 | CVE Modified | [email protected] |
| Aug 17, 2017 | CVE Modified | [email protected] |
| Jan 19, 2011 | Initial Analysis | [email protected] |