#VU16964 Input validation error in libgit2 - CVE-2018-19456

Vulnerability identifier: #VU16964

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-19456

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libgit2
Universal components / Libraries / Libraries used by multiple products

Vendor: libgit2.github.com

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insufficient validation of user-supplied input. A remote unauthenticated attacker can trick the victim into opening a specially crafted .gitmodules file and execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libgit2: All versions

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External links
https://www.auscert.org.au/bulletins/73766

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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.