NULL pointer dereference in Libssh
CVE-2023-1667
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.013 (69.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Libssh
- Debian Linux — versions 10.0
- Fedoraproject Fedora — versions 37
- Red Hat Enterprise Linux — versions 8.0, 9.0
- Libssh — versions libssh-2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/security/cve/CVE-2023-1667 (Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- www.libssh.org/security/advisories/CVE-2023-1667.txt (Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.debian.org/debian-lts-announce/2023/05/msg00029.html (mailing-list, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202312-05 (vendor-advisory)
Frequently asked questions
- What is CVE-2023-1667?
- CVE-2023-1667 is a medium-severity vulnerability in Libssh, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2023-05-26.
- How severe is CVE-2023-1667?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2023-1667 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.