CVE-2019-17455
Published: 10 October 2019
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.
From the Ubuntu Security Team
It was discovered that Libntlm incorrectly handled specially crafted NTML requests. An attacker could possibly use this issue to cause a denial of service or another unspecified impact.
Notes
Author | Note |
---|---|
ebarretto | No fix available as of 2019-12-04 |
Priority
Status
Package | Release | Status |
---|---|---|
libntlm Launchpad, Ubuntu, Debian |
hirsute |
Not vulnerable
(1.6-1)
|
bionic |
Released
(1.4-8ubuntu0.1)
|
|
disco |
Ignored
(end of life)
|
|
eoan |
Ignored
(end of life)
|
|
focal |
Released
(1.5-2ubuntu0.1)
|
|
groovy |
Not vulnerable
(1.6-1)
|
|
impish |
Not vulnerable
(1.6-1)
|
|
jammy |
Not vulnerable
(1.6-1)
|
|
trusty |
Released
(1.4-1ubuntu0.1~esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
upstream |
Released
(1.6)
|
|
xenial |
Released
(1.4-7ubuntu0.1~esm1)
Available with Ubuntu Pro |
|
Patches: upstream: https://gitlab.com/jas/libntlm/-/commit/b967886873fcf19f816b9c0868465f2d9e5df85e |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 9.8 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |