NVD Vulnerability Detail

CVE-2016-2851

Summary	Integer overflow in proto.c in libotr before 4.1.1 on 64-bit platforms allows remote attackers to cause a denial of service (memory corruption and application crash) or execute arbitrary code via a series of large OTR messages, which triggers a heap-based buffer overflow.
Publication Date	April 8, 2016, 8:59 a.m.
Registration Date	Jan. 26, 2021, 2:09 p.m.
Last Update	Nov. 21, 2024, 11:48 a.m.

CVSS3.0 : CRITICAL
スコア	9.8
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
攻撃元区分(AV)	ネットワーク
攻撃条件の複雑さ(AC)	低
攻撃に必要な特権レベル(PR)	不要
利用者の関与(UI)	不要
影響の想定範囲(S)	変更なし
機密性への影響(C)	高
完全性への影響(I)	高
可用性への影響(A)	高

CVSS2.0 : HIGH
Score	7.5
Vector	AV:N/AC:L/Au:N/C:P/I:P/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)	低
完全性への影響(I)	低
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:o:debian:debian_linux:8.0:::::::*
cpe:2.3:o:debian:debian_linux:7.0:::::::*

Configuration2	or higher	or less	more than	less than
cpe:2.3:o:opensuse:leap:42.1:::::::*
cpe:2.3:o:opensuse:opensuse:13.2:::::::*

Configuration3		or higher	or less	more than	less than
cpe:2.3:a:cypherpunks:libotr::::::::			4.1.0

Related information, measures and tools

No	URL	タグ
1	http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00021.html	Mailing List
2	http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00021.html	Mailing List
3	http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.html	Vendor Advisory
4	http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.html	Vendor Advisory
5	http://seclists.org/fulldisclosure/2016/Mar/21	Exploit Mailing List Third Party Advisory
6	http://seclists.org/fulldisclosure/2016/Mar/21	Exploit Mailing List Third Party Advisory
7	http://www.debian.org/security/2016/dsa-3512	Third Party Advisory
8	http://www.debian.org/security/2016/dsa-3512	Third Party Advisory
9	http://www.securityfocus.com/archive/1/537745/100/0/threaded	Third Party Advisory
10	http://www.securityfocus.com/archive/1/537745/100/0/threaded	Third Party Advisory
11	http://www.securityfocus.com/bid/84285	Third Party Advisory VDB Entry
12	http://www.securityfocus.com/bid/84285	Third Party Advisory VDB Entry
13	http://www.ubuntu.com/usn/USN-2926-1	Third Party Advisory
14	http://www.ubuntu.com/usn/USN-2926-1	Third Party Advisory
15	https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002581.html	Exploit
16	https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002581.html	Exploit
17	https://security.gentoo.org/glsa/201701-10	Third Party Advisory
18	https://security.gentoo.org/glsa/201701-10	Third Party Advisory
19	https://www.exploit-db.com/exploits/39550/	Third Party Advisory VDB Entry
20	https://www.exploit-db.com/exploits/39550/	Third Party Advisory VDB Entry
21	https://www.x41-dsec.de/lab/advisories/x41-2016-001-libotr/	Exploit
22	https://www.x41-dsec.de/lab/advisories/x41-2016-001-libotr/	Exploit

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-119	バッファエラー	https://cwe.mitre.org/data/definitions/118.html

JVN Vulnerability Information

64-bit プラットフォーム上で稼動する libotr の proto.c における整数オーバーフローの脆弱性

Title	64-bit プラットフォーム上で稼動する libotr の proto.c における整数オーバーフローの脆弱性
Summary	64-bit プラットフォーム上で稼動する libotr の proto.c には、整数オーバーフローの脆弱性が存在します。
Possible impacts	第三者により、一連の過度に大きな OTR メッセージを介して、ヒープベースのバッファオーバーフローを誘発されることで、サービス運用妨害 (メモリ破損およびアプリケーションクラッシュ) 状態にされる、または任意のコードを実行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	March 9, 2016, midnight
Registration Date	April 12, 2016, 5 p.m.
Last Update	April 12, 2016, 5 p.m.

Affected System

Debian

Debian GNU/Linux 7.0

Debian GNU/Linux 8.0

openSUSE project

openSUSE 13.2

openSUSE Leap 42.1

The OTR Development Team

libotr 4.1.1 未満

CVE (情報セキュリティ共通脆弱性識別子)

No	Name	URL
Common Vulnerabilities and Exposures (CVE)
1	CVE-2016-2851	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2851
National Vulnerability Database (NVD)
2	CVE-2016-2851	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-2851

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-119	https://jvndb.jvn.jp/ja/cwe/CWE-119.html

ベンダー情報

No	Name	URL
Debian Security Advisory
1	DSA-3512	https://www.debian.org/security/2016/dsa-3512
Off-the-Record Messaging
2	Security update: libotr version 4.1.1	https://otr.cypherpunks.ca/index.php
opensuse-security-announce
3	openSUSE-SU-2016:0708	https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00021.html

その他

No	Name	URL
関連文書
1	X41-2016-001: Memory Corruption Vulnerability in "libotr"	https://www.x41-dsec.de/lab/advisories/x41-2016-001-libotr/

Change Log

No	Changed Details	Date of change
0	[2016年04月12日] 掲載	Feb. 17, 2018, 10:37 a.m.