NVD Vulnerability Detail
Search Exploit, PoC
CVE-2011-0491
Summary

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."

Publication Date Jan. 19, 2011, 9 p.m.
Registration Date Jan. 28, 2021, 4:37 p.m.
Last Update Nov. 21, 2024, 10:24 a.m.
CVSS2.0 : MEDIUM
Score 5.0
Vector AV:N/AC:L/Au:N/C:N/I:N/A:P
攻撃元区分(AV) ネットワーク
攻撃条件の複雑さ(AC) 低
攻撃前の認証要否(Au) 不要
機密性への影響(C) なし
完全性への影響(I) なし
可用性への影響(A) 低
Get all privileges. いいえ
Get user privileges いいえ
Get other privileges いいえ
User operation required いいえ
Affected software configurations
Configuration1 or higher or less more than less than
cpe:2.3:a:tor:tor:0.2.1.10:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.17:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.6:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.26:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.2:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.9:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.6.2:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.8:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre24:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.9:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.30:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre16:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.5:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.23:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.5:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.11:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.7:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.6:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.8:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.10:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.19:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.18:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.2:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.10:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.22:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.11:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.8:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.7:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.5:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.19:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.10:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.25:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.9:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.31:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.14:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.8:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.13:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.28:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.5:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.12:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.3:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.5:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.5:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.35:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.16:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.17:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre17:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.26:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.17:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.8:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.1:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.9:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.25:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.17:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.5:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.14:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.19:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.1:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.2:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.26:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.12:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.2:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.7:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.3:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre19:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre23:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.6:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.7:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.9:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.15:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.29:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.27:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.8:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre14:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.1:alpha-cvs:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.18:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.5:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.7:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.4:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.13:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.3:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.6:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.3:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.27:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.14:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.12:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.14:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.23:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.3:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.7.1:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.3:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.6:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre26:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.14:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.32:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.12:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.16:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.15:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.12:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.9:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.10:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.3:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.6:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.18:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.4:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.15:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.2:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.4:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.21:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre22:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.4:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre21:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.4:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.11:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.8:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.19:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.15:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.19:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.7:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.6.1:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.22:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.3:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.14:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.24:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.2:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.6:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.3:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:*:*:*:*:*:*:*:* 0.2.1.28
cpe:2.3:a:tor:tor:0.2.1.18:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.6:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.33:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.34:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.3:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.1:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.10:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.21:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.31:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre13:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.9:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.22:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.2:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.7.3:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.8:beta:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.7.2:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.20:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.20:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.13:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.16:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.20:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.16:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.16:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.1:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.12:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.1:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.15:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.21:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.10:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.4:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.13:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre18:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.13:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.11:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.4:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.7:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.31:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre27:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.7:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.1:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.20:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.23:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.17:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.7:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.10:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.8.1:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.4:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.2:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre25:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.18:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.5:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.25:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.4:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.1.24:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.6:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.9:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.13:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.2.15:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.30:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.0.11:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.11:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.17:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre15:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.29:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre20:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.12:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.2.5:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.30:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.6:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.8:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.16:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.1.1.4:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.5:alpha:*:*:*:*:*:*
Related information, measures and tools
Common Vulnerabilities List
JVN Vulnerability Information
Tor の tor_realloc 関数におけるサービス運用妨害 (DoS) の脆弱性
Title Tor の tor_realloc 関数におけるサービス運用妨害 (DoS) の脆弱性
Summary

Tor の tor_realloc 関数は、メモリ割り当ての間に特定のサイズ値を検証しないため、サービス運用妨害 (デーモンクラッシュ) 状態となる脆弱性が存在します。 本脆弱性は桁落ちエラーに関連します。

Possible impacts 第三者により、サービス運用妨害 (デーモンクラッシュ) 状態にされる可能性があります。
Solution

ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。
Publication Date Jan. 17, 2011, midnight
Registration Date March 27, 2012, 6:42 p.m.
Last Update March 27, 2012, 6:42 p.m.
Affected System
The Tor Project
Tor 0.2.1.29 未満、および 0.2.2.21-alpha 未満の 0.2.2.x
CVE (情報セキュリティ 共通脆弱性識別子)
CWE (共通脆弱性タイプ一覧)
ベンダー情報
Change Log
No Changed Details Date of change
0 [2012年03月27日]
  掲載		 Feb. 17, 2018, 10:37 a.m.