#VU105900 Buffer overflow in libarchive - CVE-2025-25724

Vulnerability identifier: #VU105900

Vulnerability risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/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-2025-25724

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libarchive
Client/Desktop applications / Software for archiving

Vendor: libarchive

Description

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

The vulnerability exists due to a boundary error when processing .tar files within the list_item_verbose() function in tar/util.c. A remote attacker can create a specially crafted archive, trick the victim into opening it, trigger memory corruption and execute arbitrary code 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

libarchive: 3.0 - 3.7.7

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External links
https://gist.github.com/Ekkosun/a83870ce7f3b7813b9b462a395e8ad92
https://github.com/Ekkosun/pocs/blob/main/bsdtarbug
https://github.com/libarchive/libarchive/blob/b439d586f53911c84be5e380445a8a259e19114c/tar/util.c#L751-L752
https://github.com/libarchive/libarchive/releases/tag/v3.7.8

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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.