Medium severity · published May 26, 2023
CVE-2023-1667
A NULL pointer dereference was found In libssh during re-keying with algorithm guessing
6.5
CVSS
1.3%
EPSS
No
On KEV
Description
A NULL pointer dereference was found In libssh during re-keying with algorithm guessing. This issue may allow an authenticated client to cause a denial of service.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 71% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
10.0 · source: NVD
EL
Enterprise Linux · Redhat
8.0; 9.0 · source: NVD
FE
Fedora · Fedoraproject
37 · source: NVD
LI
Libssh · Libssh
0.9.1 through 0.9.6; 0.10.0 through 0.10.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-1667
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-1667
Vendor Advisory
http://www.libssh.org/security/advisories/CVE-2023-1667.txt
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-1667
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2182199
Mailing List
https://lists.debian.org/debian-lts-announce/2023/05/msg00029.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/
security.gentoo.org
https://security.gentoo.org/glsa/202312-05
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