Stack-based buffer overflow in Libntlm - CVE-2019-17455

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU50057

Stack-based buffer overflow in Libntlm - CVE-2019-17455

Published: October 10, 2019 / Updated: January 27, 2021


Vulnerability identifier: #VU50057
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-17455
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing NTLM requests in buildSmbNtlmAuthRequest in smbutil.c. A remote unauthenticated attacker can send a specially crafted NTLM request to the application, trigger a stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Affected software

Libntlm
Fedora
Ubuntu
libntlm0 (Ubuntu package)
libntlm

How to mitigate CVE-2019-17455

Install updates from vendor's website.

Libntlm - update to 1.6
libntlm0 (Ubuntu package) - addressed in versions 1.4-8ubuntu0.1, 1.5-2ubuntu0.1
libntlm - addressed in versions 1.6-1.el8, 1.6-1.fc31, 1.6-1.fc32, 1.6-1.fc33

External References

Related Security Bulletins