SUSE update for libgit2

1) Configuration

EUVDB-ID: #VU71412

Risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-22742

CWE-ID: CWE-16 - Configuration

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to missing certificate validation in libgit2, when compiled using the optional, included libssh2 backend. Prior versions of libgit2 require the caller to set the certificate_check field of libgit2's git_remote_callbacks structure - if a certificate check callback is not set, libgit2 does not perform any certificate checking. This means that by default - without configuring a certificate check callback, clients will not perform validation on the server SSH keys and may be subject to a man-in-the-middle attack.

Mitigation

Update the affected package libgit2 to the latest version.

Vulnerable software versions

Development Tools Module: 15-SP4

SUSE Linux Enterprise Server for SAP Applications 15: SP4

SUSE Linux Enterprise Server 15: SP4

SUSE Linux Enterprise Real Time 15: SP4

SUSE Linux Enterprise High Performance Computing 15: SP4

SUSE Linux Enterprise Desktop 15: SP4

SUSE Manager Retail Branch Server: 4.3

SUSE Manager Server: 4.3

SUSE Manager Proxy: 4.3

openSUSE Leap: 15.4

libgit2-1_3-32bit-debuginfo: before 1.3.0-150400.3.6.1

libgit2-1_3-32bit: before 1.3.0-150400.3.6.1

libgit2-debugsource: before 1.3.0-150400.3.6.1

libgit2-1_3-debuginfo: before 1.3.0-150400.3.6.1

libgit2-devel: before 1.3.0-150400.3.6.1

libgit2-1_3: before 1.3.0-150400.3.6.1

CPE2.3

• cpe:2.3:o:suse:development_tools_module:15-SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap_applications_15:SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_15:SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_real_time_15:SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_high_performance_computing_15:SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_desktop_15:SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_retail_branch_server:4.3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_server:4.3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_proxy:4.3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:opensuse_leap:15.4:*:*:*:*:*:*:*
• cpe:2.3:a:suse:libgit2-1_3-32bit-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgit2-1_3-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgit2-debugsource:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgit2-1_3-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgit2-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgit2-1_3:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2023/suse-su-20231788-1/

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.