Medium severity6.5NVD Advisory· Published May 26, 2023· Updated Jun 17, 2026
CVE-2023-2283
CVE-2023-2283
Description
A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in thepki_verify_data_signature function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem is caused by the return value rc, which is initialized to SSH_ERROR and later rewritten to save the return value of the function call pki_key_check_hash_compatible. The value of the variable is not changed between this point and the cryptographic verification. Therefore any error between them calls goto error returning SSH_OK.
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Affected products
36- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- osv-coords30 versionspkg:rpm/almalinux/libsshpkg:rpm/almalinux/libssh-configpkg:rpm/almalinux/libssh-develpkg:rpm/opensuse/libssh&distro=openSUSE%20Leap%2015.5pkg:rpm/opensuse/libssh&distro=openSUSE%20Leap%20Micro%205.3pkg:rpm/opensuse/libssh&distro=openSUSE%20Leap%20Micro%205.4pkg:rpm/opensuse/libssh&distro=openSUSE%20Tumbleweedpkg:rpm/suse/libssh&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSSpkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOSpkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSSpkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20Micro%205.3pkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20Micro%205.4pkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20Micro%205.5pkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP5pkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2015%20SP4pkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSSpkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2pkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/libssh&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/libssh&distro=SUSE%20Manager%20Proxy%204.3pkg:rpm/suse/libssh&distro=SUSE%20Manager%20Server%204.3
< 0.9.6-10.el8_8+ 29 more
- (no CPE)range: < 0.9.6-10.el8_8
- (no CPE)range: < 0.9.6-10.el8_8
- (no CPE)range: < 0.9.6-10.el8_8
- (no CPE)range: < 0.9.8-150400.3.3.1
- (no CPE)range: < 0.9.8-150400.3.3.1
- (no CPE)range: < 0.9.8-150400.3.3.1
- (no CPE)range: < 0.10.5-1.1
- (no CPE)range: < 0.9.8-150200.13.3.1
- (no CPE)range: < 0.9.8-150200.13.3.1
- (no CPE)range: < 0.9.8-150200.13.3.1
- (no CPE)range: < 0.9.8-150400.3.3.1
- (no CPE)range: < 0.9.8-150400.3.3.1
- (no CPE)range: < 0.9.8-150200.13.3.1
- (no CPE)range: < 0.9.8-150200.13.3.1
- (no CPE)range: < 0.9.8-150400.3.3.1
- (no CPE)range: < 0.9.8-150400.3.3.1
- (no CPE)range: < 0.9.8-150400.3.3.1
- (no CPE)range: < 0.9.8-150400.3.3.1
- (no CPE)range: < 0.9.8-150400.3.3.1
- (no CPE)range: < 0.9.8-3.12.2
- (no CPE)range: < 0.9.8-150200.13.3.1
- (no CPE)range: < 0.9.8-150200.13.3.1
- (no CPE)range: < 0.9.8-150400.3.3.1
- (no CPE)range: < 0.9.8-3.12.2
- (no CPE)range: < 0.9.8-150200.13.3.1
- (no CPE)range: < 0.9.8-150200.13.3.1
- (no CPE)range: < 0.9.8-150400.3.3.1
- (no CPE)range: < 0.9.8-3.12.2
- (no CPE)range: < 0.9.8-150400.3.3.1
- (no CPE)range: < 0.9.8-150400.3.3.1
Patches
Vulnerability mechanics
References
8- access.redhat.com/security/cve/CVE-2023-2283nvdThird Party Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingThird Party Advisory
- www.libssh.org/security/advisories/CVE-2023-2283.txtnvdVendor Advisory
- packetstormsecurity.com/files/172861/libssh-0.9.6-0.10.4-pki_verify_data_signature-Authorization-Bypass.htmlnvd
- seclists.org/fulldisclosure/2025/Feb/18nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/nvd
- security.gentoo.org/glsa/202312-05nvd
- security.netapp.com/advisory/ntap-20240201-0005/nvd
News mentions
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