Critical severity · published Oct 10, 2019
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…
9.8
CVSS
3.1%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.1% · higher than 88% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BS
Backports Sle · Opensuse
15.0 · source: NVD
DL
Debian Linux · Debian
8.0; 9.0 · source: NVD
FE
Fedora · Fedoraproject
32; 33 · source: NVD
LE
Leap · Opensuse
15.1 · source: NVD
LI
Libntlm · Nongnu
through 1.5 · source: NVD
UL
Ubuntu Linux · Canonical
14.04; 16.04; 18.04; 20.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-17455
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-17455
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00032.html
Exploit
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145
Exploit
https://gitlab.com/jas/libntlm/issues/2
Mailing List
https://lists.debian.org/debian-lts-announce/2020/05/msg00010.html
Mailing List
https://lists.debian.org/debian-lts-announce/2021/11/msg00026.html
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