libarchive up to 3.7.x archive_read_support_format_warc.c archive_read_support_format_warc integer overflow

Summaryinfo

A vulnerability classified as critical was found in libarchive up to 3.7.x. Affected by this vulnerability is the function archive_read_support_format_warc of the file archive_read_support_format_warc.c. Such manipulation leads to integer overflow. This vulnerability is documented as CVE-2025-5916. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in libarchive up to 3.7.x. It has been rated as critical. Affected by this issue is the function archive_read_support_format_warc of the file archive_read_support_format_warc.c. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A vulnerability has been identified in the libarchive library. This flaw involves an integer overflow that can be triggered when processing a Web Archive (WARC) file that claims to have more than INT64_MAX - 4 content bytes. An attacker could craft a malicious WARC archive to induce this overflow, potentially leading to unpredictable program behavior, memory corruption, or a denial-of-service condition within applications that process such archives using libarchive. This bug affects libarchive versions prior to 3.8.0.

The advisory is shared for download at bugzilla.redhat.com. This vulnerability is handled as CVE-2025-5916 since 06/09/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 241063 (Ubuntu 22.04 LTS / 24.04 LTS / 24.10 / 25.04 : libarchive vulnerabilities (USN-7601-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.8.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (241063) and EUVD (EUVD-2025-17575). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• File Compression Software

Name

• libarchive

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7

License

• open-source

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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