CVE-2019-17455
CRITICAL severity · CVSS 9.8 · Out-of-bounds read
9.8CVSS CRITICAL
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)3%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00032.htmlAdvisory
- https://lists.debian.org/debian-lts-announce/2020/05/msg00010.htmlAdvisory
- https://lists.debian.org/debian-lts-announce/2021/11/msg00026.htmlAdvisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BVFO3OVJPMSGIXBKNOCVOJZ3UTGZQF5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZ5YWYNOJ5HMCKAHWLTY4MXZQWJJCBI7/
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145Advisory
- https://gitlab.com/jas/libntlm/issues/2Advisory