NULL pointer dereference in lrzip

1) NULL pointer dereference

EUVDB-ID: #VU63643

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-25467

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error in the lzo_decompress_buf in stream.c. A remote attacker can trick the victim to open a specially crafted compressed file and trigger denial of service conditions.

Mitigation

Install update from vendor's website.

Vulnerable software versions

lrzip: 0.5 - 0.621

External links

http://bugs.launchpad.net/ubuntu/+source/lrzip/+bug/1893641
http://github.com/ckolivas/lrzip/issues/163
http://lists.debian.org/debian-lts-announce/2022/04/msg00012.html

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.