Vulnerability identifier: #VU47227

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26682

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libass
Other software / Other software solutions

Vendor: libass

Description

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

The vulnerability exists due to integer overflow when the ass_outline_construct() function calls to the outline_stroke() function in ass_outline.c. A remote attacker can pass specially crafted data to the application, trigger integer overflow and execute arbitrary code on the target system.

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

Mitigation
Install update from vendor's website.

Vulnerable software versions

libass: 0.14.0

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External links
http://github.com/libass/libass/issues/431
http://github.com/libass/libass/pull/432

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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.