NVD Vulnerability Detail

CVE-2014-6053

Summary	The rfbProcessClientNormalMessage function in libvncserver/rfbserver.c in LibVNCServer 0.9.9 and earlier does not properly handle attempts to send a large amount of ClientCutText data, which allows remote attackers to cause a denial of service (memory consumption or daemon crash) via a crafted message that is processed by using a single unchecked malloc.
Publication Date	Dec. 16, 2014, 3:59 a.m.
Registration Date	Jan. 26, 2021, 3:15 p.m.
Last Update	Nov. 21, 2024, 11:13 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:libvncserver:libvncserver::::::::			0.9.9

Configuration2	or higher	or less	more than	less than
cpe:2.3:o:canonical:ubuntu_linux:12.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::

Configuration3		or higher	or less	more than	less than
cpe:2.3:o:debian:debian_linux:7.0:::::::*

Related information, measures and tools

No	URL	タグ
1	http://lists.opensuse.org/opensuse-updates/2015-12/msg00022.html
2	http://lists.opensuse.org/opensuse-updates/2015-12/msg00022.html
3	http://seclists.org/oss-sec/2014/q3/639	Mailing List Third Party Advisory
4	http://seclists.org/oss-sec/2014/q3/639	Mailing List Third Party Advisory
5	http://secunia.com/advisories/61506
6	http://secunia.com/advisories/61506
7	http://secunia.com/advisories/61682
8	http://secunia.com/advisories/61682
9	http://ubuntu.com/usn/usn-2365-1	Third Party Advisory
10	http://ubuntu.com/usn/usn-2365-1	Third Party Advisory
11	http://www.debian.org/security/2014/dsa-3081	Third Party Advisory
12	http://www.debian.org/security/2014/dsa-3081	Third Party Advisory
13	http://www.ocert.org/advisories/ocert-2014-007.html	Third Party Advisory US Government Resource
14	http://www.ocert.org/advisories/ocert-2014-007.html	Third Party Advisory US Government Resource
15	http://www.openwall.com/lists/oss-security/2014/09/25/11	Mailing List Third Party Advisory
16	http://www.openwall.com/lists/oss-security/2014/09/25/11	Mailing List Third Party Advisory
17	https://github.com/newsoft/libvncserver/commit/6037a9074d52b1963c97cb28ea1096c7c14cbf28	Issue Tracking Patch
18	https://github.com/newsoft/libvncserver/commit/6037a9074d52b1963c97cb28ea1096c7c14cbf28	Issue Tracking Patch
19	https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
20	https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
21	https://lists.debian.org/debian-lts-announce/2019/11/msg00032.html
22	https://lists.debian.org/debian-lts-announce/2019/11/msg00032.html
23	https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html
24	https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html
25	https://security.gentoo.org/glsa/201507-07
26	https://security.gentoo.org/glsa/201507-07
27	https://usn.ubuntu.com/4573-1/
28	https://usn.ubuntu.com/4573-1/
29	https://usn.ubuntu.com/4587-1/
30	https://usn.ubuntu.com/4587-1/

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-19	データ処理	https://cwe.mitre.org/data/definitions/19.html

JVN Vulnerability Information

LibVNCServer の libvncserver/rfbserver.c 内の rfbProcessClientNormalMessage 関数におけるサービス運用妨害 (DoS) の脆弱性

Title	LibVNCServer の libvncserver/rfbserver.c 内の rfbProcessClientNormalMessage 関数におけるサービス運用妨害 (DoS) の脆弱性
Summary	LibVNCServer の libvncserver/rfbserver.c 内の rfbProcessClientNormalMessage 関数は、大量の ClientCutText データ送信の試行を適切に処理しないため、サービス運用妨害 (メモリ消費またはデーモンクラッシュ) 状態にされる脆弱性が存在します。補足情報 : CWE による脆弱性タイプは、CWE-19: Data Handling (データ処理) と識別されています。 http://cwe.mitre.org/data/definitions/19.html
Possible impacts	第三者により、single unchecked malloc を使用して処理される巧妙に細工されたメッセージを介して、サービス運用妨害 (メモリ消費または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	Aug. 18, 2014, midnight
Registration Date	Dec. 17, 2014, 2:49 p.m.
Last Update	Dec. 17, 2014, 2:49 p.m.

Affected System

LibVNC

LibVNCServer 0.9.9 およびそれ以前

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-2014-6053	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6053
National Vulnerability Database (NVD)
2	CVE-2014-6053	https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-6053

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-Other	https://www.ipa.go.jp/security/vuln/CWE.html#CWEOther

ベンダー情報

No	Name	URL
GitHub
1	Check malloc() return value on client->server ClientCutText message.	https://github.com/newsoft/libvncserver/commit/6037a9074d52b1963c97cb28ea1096c7c14cbf28
Ubuntu Security Notice
2	USN-2365-1	http://www.ubuntu.com/usn/usn-2365-1/

Change Log

No	Changed Details	Date of change
0	[2014年12月17日] 掲載	Feb. 17, 2018, 10:37 a.m.