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 |