SB2019101016 - Remote code execution in Libntlm
Published: October 10, 2019 Updated: January 27, 2021
Security Bulletin ID
SB2019101016
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Stack-based buffer overflow (CVE-ID: CVE-2019-17455)
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.
Remediation
Install update from vendor's website.
References
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.html
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00032.html
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145
- https://gitlab.com/jas/libntlm/issues/2
- https://lists.debian.org/debian-lts-announce/2020/05/msg00010.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3BVFO3OVJPMSGIXBKNOCVOJZ3UTGZQF5/
- https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-17455.html
- https://security-tracker.debian.org/tracker/CVE-2019-17455