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openSUSE 16 Security Update : libssh (openSUSE-SU-2026:21444-1)
medium Nessus Plugin ID 330077
Synopsis
The remote openSUSE host is missing one or more security updates.Description
The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21444-1 advisory.- CVE-2026-15370: stack buffer overflow in SFTP server longname construction (bsc#1272162).
- CVE-2026-59843: denial of service via zero advertised channel packet size (bsc#1272164).
- CVE-2026-59844: denial of service via oversized SFTP read length (bsc#1272165).
- CVE-2026-59845: denial of service via unchecked ProxyCommand fork() failure (bsc#1272166).
- CVE-2026-59846: information disclosure via ProxyCommand %r username expansion (bsc#1272167).
- CVE-2026-59847: integrity downgrade via OpenSSL AES-GCM tag verification (bsc#1272168).
- CVE-2026-59848: denial of service via SFTP responses with unknown request IDs (bsc#1272169).
- CVE-2026-59849: denial of service via automatic certificate authentication loop (bsc#1272170).
- CVE-2026-59850: use-after-free via data callbacks on closed channels (bsc#1272171).
Changes for libssh:
- Update to 0.11.5:
* Zero-initialize every ssh_string
* Fix compatibility with C23 / gcc16
* Fix multiple memory leaks, null checks, and error checks
* Validate peer public key in DH key exchange
* Avoid remote window overflow
* Avoid off-by-one overflow during kbdint authentication
* Avoid logging uninitialized sequence numbers
* Avoid double conversion of SFTP version number
* Send correct SFTP server version number
* Avoid handling repeated SFTP INIT messages
* Harmonize return values from SFTP server callbacks
- Update %suse_version checks for SLES 16.x (jsc#PED-15815)
Tenable has extracted the preceding description block directly from the SUSE security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected libssh-config, libssh-devel and / or libssh4 packages.See Also
https://bugzilla.suse.com/1272162
https://bugzilla.suse.com/1272164
https://bugzilla.suse.com/1272165
https://bugzilla.suse.com/1272166
https://bugzilla.suse.com/1272167
https://bugzilla.suse.com/1272168
https://bugzilla.suse.com/1272169
https://bugzilla.suse.com/1272170
https://bugzilla.suse.com/1272171
https://www.suse.com/security/cve/CVE-2026-15370
https://www.suse.com/security/cve/CVE-2026-59843
https://www.suse.com/security/cve/CVE-2026-59844
https://www.suse.com/security/cve/CVE-2026-59845
https://www.suse.com/security/cve/CVE-2026-59846
https://www.suse.com/security/cve/CVE-2026-59847
https://www.suse.com/security/cve/CVE-2026-59848
Plugin Details
Severity: Medium
ID: 330077
File Name: openSUSE-2026-21444-1.nasl
Version: 1.1
Type: Local
Agent: unix
Family: SuSE Local Security Checks
Published: 7/27/2026
Updated: 7/27/2026
Supported Sensors: Nessus Agent, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.9
Percentile: 96.84
CVSS v2
Risk Factor: Medium
Base Score: 6.1
Temporal Score: 4.5
Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:C/A:P
CVSS Score Source: CVE-2026-59847
CVSS v3
Risk Factor: Medium
Base Score: 6.7
Temporal Score: 5.8
Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS Score Source: CVE-2026-15370
Vulnerability Information
CPE: cpe:/o:novell:opensuse:16.0, p-cpe:/a:novell:opensuse:libssh-config, p-cpe:/a:novell:opensuse:libssh-devel, p-cpe:/a:novell:opensuse:libssh4
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 7/25/2026
Vulnerability Publication Date: 7/21/2026
Reference Information
CVE: CVE-2026-15370, CVE-2026-59843, CVE-2026-59844, CVE-2026-59845, CVE-2026-59846, CVE-2026-59847, CVE-2026-59848, CVE-2026-59849, CVE-2026-59850