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JVN脆弱性詳細

strongSwan の is_asn1 関数におけるサービス運用妨害 (DoS) の脆弱性

Title	strongSwan の is_asn1 関数におけるサービス運用妨害 (DoS) の脆弱性
Summary	strongSwan の is_asn1 関数は、asn1_length 関数の戻り値を適切に検証しないため、サービス運用妨害 (セグメンテーション違反) 状態にされる脆弱性が存在します。
Possible impacts	第三者により、整数オーバーフローを誘発する ASN.1 の length 値に続いて 0x04、0x30、または 0x31 の文字で始まる (1) XAuth ユーザ名、(2) EAP アイデンティティ、または (3) PEM エンコードファイルを介して、サービス運用妨害 (セグメンテーション違反) 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. 1, 2013, midnight
Registration Date	Aug. 30, 2013, 3:36 p.m.
Last Update	Aug. 30, 2013, 3:36 p.m.

Affected System

Novell

openSUSE 11.4

openSUSE 12.2

openSUSE 12.3

strongSwan

strongSwan 4.1.11 から 5.0.4

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-2013-5018	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-5018
National Vulnerability Database (NVD)
2	CVE-2013-5018	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-5018

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
opensuse-updates
1	openSUSE-SU-2013:1332	http://lists.opensuse.org/opensuse-updates/2013-08/msg00021.html
2	openSUSE-SU-2013:1333	http://lists.opensuse.org/opensuse-updates/2013-08/msg00022.html
3	openSUSE-SU-2013:1372	http://lists.opensuse.org/opensuse-updates/2013-08/msg00050.html
strongSwan
4	strongSwan 5.1.0 Released	http://strongswan.org/blog/2013/08/01/strongswan-5.1.0-released.html
5	strongSwan Denial-of-Service Vulnerability (CVE-2013-5018)	http://strongswan.org/blog/2013/08/01/strongswan-denial-of-service-vulnerability-%28cve-2013-5018%29.html

Change Log

No	Changed Details	Date of change
0	[2013年08月30日] 掲載	Feb. 17, 2018, 10:37 a.m.

NVD Vulnerability Information

CVE-2013-5018

Summary	The is_asn1 function in strongSwan 4.1.11 through 5.0.4 does not properly validate the return value of the asn1_length function, which allows remote attackers to cause a denial of service (segmentation fault) via a (1) XAuth username, (2) EAP identity, or (3) PEM encoded file that starts with a 0x04, 0x30, or 0x31 character followed by an ASN.1 length value that triggers an integer overflow.
Publication Date	Aug. 29, 2013, 8:55 a.m.
Registration Date	Jan. 26, 2021, 3:44 p.m.
Last Update	Nov. 21, 2024, 10:56 a.m.

Affected software configurations

Configuration1		or higher	or less	more than	less than
cpe:2.3:a:strongswan:strongswan:4.1.11:::::::*

Related information, measures and tools

No	URL	タグ
1	http://lists.opensuse.org/opensuse-updates/2013-08/msg00021.html
2	http://lists.opensuse.org/opensuse-updates/2013-08/msg00021.html
3	http://lists.opensuse.org/opensuse-updates/2013-08/msg00022.html
4	http://lists.opensuse.org/opensuse-updates/2013-08/msg00022.html
5	http://lists.opensuse.org/opensuse-updates/2013-08/msg00050.html
6	http://lists.opensuse.org/opensuse-updates/2013-08/msg00050.html
7	http://secunia.com/advisories/54315	Vendor Advisory
8	http://secunia.com/advisories/54315	Vendor Advisory
9	http://secunia.com/advisories/54524	Vendor Advisory
10	http://secunia.com/advisories/54524	Vendor Advisory
11	http://strongswan.org/blog/2013/08/01/strongswan-5.1.0-released.html	Vendor Advisory
12	http://strongswan.org/blog/2013/08/01/strongswan-5.1.0-released.html	Vendor Advisory
13	http://strongswan.org/blog/2013/08/01/strongswan-denial-of-service-vulnerability-%28cve-2013-5018%29.html	Vendor Advisory
14	http://strongswan.org/blog/2013/08/01/strongswan-denial-of-service-vulnerability-%28cve-2013-5018%29.html	Vendor Advisory
15	http://www.securityfocus.com/bid/61564
16	http://www.securityfocus.com/bid/61564
17	https://lists.strongswan.org/pipermail/users/2013-July/009540.html	Exploit
18	https://lists.strongswan.org/pipermail/users/2013-July/009540.html	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