CVE-2023-1667 — NULL Pointer Dereference in Libssh

CWE-476 — NULL Pointer DereferenceCWE-20 — Improper Input Validation9 documents8 sources
Severity
6.5MEDIUMNVD
EPSS
1.1%
top 21.65%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
LibsshDebian LinuxFedoraproject Fedora+1 more
Timeline
PublishedMay 26
Latest updateSep 21

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:HExploitability: 2.8 | Impact: 3.6

Affected Packages4 packages

▶Debianlibssh/libssh< 0.9.7-0+deb11u1+3
▶Ubuntulibssh/libssh< 0.9.3-2ubuntu2.3+1
▶NVDlibssh/libssh0.9.1 — 0.9.6+1
▶CVEListV5libssh/libsshlibssh-2

Also affects: Debian Linux 10.0, Fedora 37, Enterprise Linux 8.0, 9.0

🔴Vulnerability Details

5
GHSA
Denial of Service issue in quinn-proto↗2023-09-21
▶
OSV
libssh vulnerabilities↗2023-06-05
▶
OSV
CVE-2023-1667: A NULL pointer dereference was found In libssh during re-keying with algorithm guessing↗2023-05-26
▶
GHSA
GHSA-fx73-x3p9-h2wf: A NULL pointer dereference was found In libssh during re-keying with algorithm guessing↗2023-05-26
▶
CVEList
CVE-2023-1667: A NULL pointer dereference was found In libssh during re-keying with algorithm guessing↗2023-05-26
▶

📋Vendor Advisories

3
Ubuntu
libssh vulnerabilities↗2023-06-05
▶
Red Hat
libssh: NULL pointer dereference during rekeying with algorithm guessing↗2023-04-30
▶
Debian
CVE-2023-1667: libssh - A NULL pointer dereference was found In libssh during re-keying with algorithm g...↗2023
▶
CVE-2023-1667 — NULL Pointer Dereference in Libssh | cvebase