openEuler 22.03 LTS SP3 update for libssh

1) Unchecked Return Value

EUVDB-ID: #VU84540

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-6918

CWE-ID: CWE-252 - Unchecked Return Value

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to libssh does not check for returned values of message digest (MD) operations in low memory conditions. A remote attacker can terminate the connection or force the library to use weak keys.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 22.03 LTS SP3

libssh-help: before 0.9.6-8

libssh-debuginfo: before 0.9.6-8

libssh-devel: before 0.9.6-8

libssh-debugsource: before 0.9.6-8

libssh: before 0.9.6-8

CPE2.3

• cpe:2.3:o:openeuler:openeuler:22.03:LTS SP3:*:*:*:*:*:*
• cpe:2.3:a:openeuler:libssh-help:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:libssh-debuginfo:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:libssh-devel:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:libssh-debugsource:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:libssh:*:*:*:*:*:openeuler:*:*

External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2024-1043

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.