Denial of service in XZ Utils

1) Resource exhaustion

EUVDB-ID: #VU88539

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-22916

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources when decompressing files. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

XZ Utils: 5.2.5

External links

http://github.com/snappyJack/CVE-request-XZ-5.2.5-has-denial-of-service-vulnerability
http://github.com/tukaani-project/xz/issues/61
http://bugzilla.redhat.com/show_bug.cgi?id=2234987
http://bugzilla.suse.com/show_bug.cgi?id=1214590
http://security-tracker.debian.org/tracker/CVE-2020-22916
http://web.archive.org/web/20230918084612/
http://github.com/snappyJack/CVE-request-XZ-5.2.5-has-denial-of-service-vulnerability

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.