NVD Vulnerability Detail

CVE-2019-16928

Summary	Exim 4.92 through 4.92.2 allows remote code execution, a different vulnerability than CVE-2019-15846. There is a heap-based buffer overflow in string_vformat in string.c involving a long EHLO command.
Publication Date	Sept. 28, 2019, 6:15 a.m.
Registration Date	Jan. 26, 2021, 11:40 a.m.
Last Update	March 7, 2025, 11:24 p.m.

CVSS3.1 : CRITICAL
スコア	9.8
Vector	CVSS:3.1/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:a:exim:exim::::::::		4.92	4.92.2

Configuration2		or higher	or less	more than	less than
cpe:2.3:o:canonical:ubuntu_linux:19.04:::::::*

Configuration3		or higher	or less	more than	less than
cpe:2.3:o:debian:debian_linux:10.0:::::::*

Configuration4	or higher	or less	more than	less than
cpe:2.3:o:fedoraproject:fedora:29:::::::*
cpe:2.3:o:fedoraproject:fedora:30:::::::*
cpe:2.3:o:fedoraproject:fedora:31:::::::*

Related information, measures and tools

No	URL	タグ
1	http://www.openwall.com/lists/oss-security/2019/09/28/1	Exploit Mailing List Mitigation Third Party Advisory
2	http://www.openwall.com/lists/oss-security/2019/09/28/2	Exploit Mailing List Third Party Advisory
3	http://www.openwall.com/lists/oss-security/2019/09/28/3	Mailing List Third Party Advisory
4	http://www.openwall.com/lists/oss-security/2019/09/28/4	Mailing List Third Party Advisory
5	https://bugs.exim.org/show_bug.cgi?id=2449	Issue Tracking Patch Vendor Advisory
6	https://git.exim.org/exim.git/commit/478effbfd9c3cc5a627fc671d4bf94d13670d65f	Patch
7	https://lists.exim.org/lurker/message/20190927.032457.c1044d4c.en.html	Vendor Advisory
8	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EED7HM3MFIBAP5OIMJAFJ35JAJABTVSC/	Release Notes
9	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T3TJW4HPYH3O5HZCWGD6NSHTEBTTAPDC/	Release Notes
10	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UY6HPRW7MR3KBQ5JFHH6OXM7YCZBJCOB/	Release Notes
11	https://seclists.org/bugtraq/2019/Sep/60	Mailing List Third Party Advisory
12	https://security.gentoo.org/glsa/202003-47	Third Party Advisory
13	https://usn.ubuntu.com/4141-1/	Third Party Advisory
14	https://www.debian.org/security/2019/dsa-4536	Third Party Advisory
15	http://www.openwall.com/lists/oss-security/2019/09/28/1	Exploit Mailing List Mitigation Third Party Advisory
16	https://www.debian.org/security/2019/dsa-4536	Third Party Advisory
17	https://usn.ubuntu.com/4141-1/	Third Party Advisory
18	https://security.gentoo.org/glsa/202003-47	Third Party Advisory
19	https://seclists.org/bugtraq/2019/Sep/60	Mailing List Third Party Advisory
20	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UY6HPRW7MR3KBQ5JFHH6OXM7YCZBJCOB/	Release Notes
21	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T3TJW4HPYH3O5HZCWGD6NSHTEBTTAPDC/	Release Notes
22	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EED7HM3MFIBAP5OIMJAFJ35JAJABTVSC/	Release Notes
23	https://lists.exim.org/lurker/message/20190927.032457.c1044d4c.en.html	Vendor Advisory
24	https://git.exim.org/exim.git/commit/478effbfd9c3cc5a627fc671d4bf94d13670d65f	Patch
25	https://bugs.exim.org/show_bug.cgi?id=2449	Issue Tracking Patch Vendor Advisory
26	http://www.openwall.com/lists/oss-security/2019/09/28/4	Mailing List Third Party Advisory
27	http://www.openwall.com/lists/oss-security/2019/09/28/3	Mailing List Third Party Advisory
28	http://www.openwall.com/lists/oss-security/2019/09/28/2	Exploit Mailing List Third Party Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-787	境界外書き込み	https://cwe.mitre.org/data/definitions/787.html

JVN Vulnerability Information

Exim における古典的バッファオーバーフローの脆弱性

Title	Exim における古典的バッファオーバーフローの脆弱性
Summary	Exim には、古典的バッファオーバーフローの脆弱性が存在します。本脆弱性は、CVE-2019-15846 とは異なる脆弱性です。
Possible impacts	情報を取得される、情報を改ざんされる、およびサービス運用妨害 (DoS) 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	Sept. 27, 2019, midnight
Registration Date	Oct. 2, 2019, 2:58 p.m.
Last Update	Oct. 2, 2019, 2:58 p.m.

Affected System

Debian

Debian GNU/Linux

Canonical

Ubuntu

Exim Development

Exim 4.92 から 4.92.2

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-2019-16928	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16928
National Vulnerability Database (NVD)
2	CVE-2019-16928	https://nvd.nist.gov/vuln/detail/CVE-2019-16928

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-120	https://cwe.mitre.org/data/definitions/120.html

ベンダー情報

No	Name	URL
Bugzilla
1	Bug 2449	https://bugs.exim.org/show_bug.cgi?id=2449
Debian Security Advisory
2	DSA-4536	https://www.debian.org/security/2019/dsa-4536
Exim
3	[exim-dev] [Bug 2449] New: Heap Overflow	https://lists.exim.org/lurker/message/20190927.032457.c1044d4c.en.html
Git
4	Fix buffer overflow in string_vformat. Bug 2449	https://git.exim.org/exim.git/commit/478effbfd9c3cc5a627fc671d4bf94d13670d65f
Ubuntu Security Notice
5	USN-4141-1	https://usn.ubuntu.com/4141-1/

Change Log

No	Changed Details	Date of change
1	[2019年10月02日] 掲載	Oct. 2, 2019, 2:58 p.m.