CVE-2019-17455
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.11%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.11% probability · 87th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- nongnu/libntlm · debian/debian linux · canonical/ubuntu linux · fedoraproject/fedora · opensuse/backports sle · opensuse/leap
- Source
- cve@mitre.org
References
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00032.htmlMailing List, Third Party Advisory
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145Exploit, Issue Tracking, Mailing List, Third Party Advisory
- https://gitlab.com/jas/libntlm/issues/2Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/05/msg00010.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/11/msg00026.htmlMailing List, Third Party Advisory
- 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://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-17455.htmlThird Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2019-17455Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00032.htmlMailing List, Third Party Advisory
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145Exploit, Issue Tracking, Mailing List, Third Party Advisory
- https://gitlab.com/jas/libntlm/issues/2Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/05/msg00010.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/11/msg00026.htmlMailing List, Third Party Advisory
- 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://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-17455.htmlThird Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2019-17455Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.