#VU49155 OS Command Injection in kitty - CVE-2020-35605

Vulnerability identifier: #VU49155

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-35605

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
kitty
Other software / Other software solutions

Vendor: sw.kovidgoyal.net

Description

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

The vulnerability exists due to improper input validation within the Graphics Protocol feature in graphics.c in kitty when processing a filename containing special characters. A remote unauthenticated attacker can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

kitty: 0.12.1 - 0.19.2

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External links
https://github.com/kovidgoyal/kitty/commit/82c137878c2b99100a3cdc1c0f0efea069313901
https://github.com/kovidgoyal/kitty/issues/3128
https://www.debian.org/security/2020/dsa-4819

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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.