CVE-2019-17455

CVSS V2 High 7.5 CVSS V3 Critical 9.8

Description

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.

Overview

CVE ID
CVE-2019-17455

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2019-10-10T18:15:11

Last Modified Date
2021-11-30T19:42:16

Weakness Enumerations

CWE	URL
CWE-125	http://cwe.mitre.org/data/definitions/125.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version End
cpe:2.3:a:nongnu:libntlm::::::::	1	OR	1.5
cpe:2.3:o:debian:debian_linux:8.0:::::::*	1	OR
cpe:2.3:o:debian:debian_linux:9.0:::::::*	1	OR
cpe:2.3:o:canonical:ubuntu_linux:14.04::::esm:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:20.04::::lts:::	1	OR
cpe:2.3:o:fedoraproject:fedora:32:::::::*	1	OR
cpe:2.3:o:fedoraproject:fedora:33:::::::*	1	OR
cpe:2.3:a:opensuse:backports_sle:15.0:sp1::::::	1	OR
cpe:2.3:o:opensuse:leap:15.1:::::::*	1	OR

CVSS Version 2

Version
2.0

Vector String
AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector
NETWORK

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
PARTIAL

Availability Impact
PARTIAL

Base Score
7.5

Severity
HIGH

Exploitability Score
10

Impact Score
6.4

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
HIGH

Base Score
9.8

Base Severity
CRITICAL

Exploitability Score
3.9

Impact Score
5.9

References

Reference URL	Reference Tags
https://gitlab.com/jas/libntlm/issues/2	Exploit Third Party Advisory
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145	Exploit Issue Tracking Mailing List Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2019-17455	Third Party Advisory
https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-17455.html	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/05/msg00010.html	Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00032.html	Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.html	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3BVFO3OVJPMSGIXBKNOCVOJZ3UTGZQF5/	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YZ5YWYNOJ5HMCKAHWLTY4MXZQWJJCBI7/	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/11/msg00026.html	Mailing List Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2019-17455
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-17455

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 06:44:23				Added to TrackCVE
2022-12-04 04:12:45	2019-10-10T18:15Z	2019-10-10T18:15:11	CVE Published Date	updated
2022-12-04 04:12:45		2021-11-30T19:42:16	CVE Modified Date	updated
2022-12-04 04:12:45		Analyzed	Vulnerability Status	updated