NVD Vulnerability Detail

CVE-2019-17455

Summary	Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as demonstrated by a stack-based buffer over-read in buildSmbNtlmAuthRequest in smbutil.c for a crafted NTLM request.
Publication Date	Oct. 11, 2019, 3:15 a.m.
Registration Date	Jan. 26, 2021, 11:40 a.m.
Last Update	Nov. 21, 2024, 1:32 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:nongnu:libntlm::::::::			1.5

Configuration2	or higher	or less	more than	less than
cpe:2.3:o:debian:debian_linux:8.0:::::::*
cpe:2.3:o:debian:debian_linux:9.0:::::::*

Configuration3	or higher	or less	more than	less than
cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:14.04::::esm:::
cpe:2.3:o:canonical:ubuntu_linux:20.04::::lts:::

Configuration4	or higher	or less	more than	less than
cpe:2.3:o:fedoraproject:fedora:32:::::::*
cpe:2.3:o:fedoraproject:fedora:33:::::::*

Configuration5	or higher	or less	more than	less than
cpe:2.3:o:opensuse:leap:15.1:::::::*
cpe:2.3:a:opensuse:backports_sle:15.0:sp1::::::

Related information, measures and tools

No	URL	タグ
1	http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.html	Mailing List Third Party Advisory
2	http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.html	Mailing List Third Party Advisory
3	http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00032.html	Mailing List Third Party Advisory
4	http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00032.html	Mailing List Third Party Advisory
5	https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145	Exploit Issue Tracking Mailing List Third Party Advisory
6	https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145	Exploit Issue Tracking Mailing List Third Party Advisory
7	https://gitlab.com/jas/libntlm/issues/2	Exploit Third Party Advisory
8	https://gitlab.com/jas/libntlm/issues/2	Exploit Third Party Advisory
9	https://lists.debian.org/debian-lts-announce/2020/05/msg00010.html	Mailing List Third Party Advisory
10	https://lists.debian.org/debian-lts-announce/2020/05/msg00010.html	Mailing List Third Party Advisory
11	https://lists.debian.org/debian-lts-announce/2021/11/msg00026.html	Mailing List Third Party Advisory
12	https://lists.debian.org/debian-lts-announce/2021/11/msg00026.html	Mailing List Third Party Advisory
13	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BVFO3OVJPMSGIXBKNOCVOJZ3UTGZQF5/
14	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BVFO3OVJPMSGIXBKNOCVOJZ3UTGZQF5/
15	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZ5YWYNOJ5HMCKAHWLTY4MXZQWJJCBI7/
16	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZ5YWYNOJ5HMCKAHWLTY4MXZQWJJCBI7/
17	https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-17455.html	Third Party Advisory
18	https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-17455.html	Third Party Advisory
19	https://security-tracker.debian.org/tracker/CVE-2019-17455	Third Party Advisory
20	https://security-tracker.debian.org/tracker/CVE-2019-17455	Third Party Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-125	境界外読み取り	https://cwe.mitre.org/data/definitions/125.html

JVN Vulnerability Information

Libntlm における古典的バッファオーバーフローの脆弱性

Title	Libntlm における古典的バッファオーバーフローの脆弱性
Summary	Libntlm 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。
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	ベンダ情報および参考情報を参照して適切な対策を実施してください。
Publication Date	Oct. 8, 2019, midnight
Registration Date	Oct. 21, 2019, 12:13 p.m.
Last Update	Oct. 21, 2019, 12:13 p.m.

Affected System

Debian

Debian GNU/Linux

Canonical

Ubuntu

nongnu

Libntlm 1.5 まで

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-2019-17455	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-17455
Debian Security Tracker
2	CVE-2019-17455	https://security-tracker.debian.org/tracker/CVE-2019-17455
National Vulnerability Database (NVD)
3	CVE-2019-17455	https://nvd.nist.gov/vuln/detail/CVE-2019-17455
Ubuntu CVE Tracker
4	CVE-2019-17455	https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-17455.html

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
Debian Bug report logs
1	942145	https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145
GitLab
2	Buffer Overflow Write when libntlm generates NTLM request (version<=1.5)	https://gitlab.com/jas/libntlm/issues/2

その他

No	Name	URL
関連文書
1	Buffer Overflow Write when libntlm generates NTLM request (version<=1.5)	https://gitlab.com/jas/libntlm/issues/2

Change Log

No	Changed Details	Date of change
1	[2019年10月21日] 掲載	Oct. 21, 2019, 12:13 p.m.