Vulnerability identifier: #VU23841

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

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 archives in /libarchive/archive_read_support_format_rar5.c in RAR5 reader. The application was using a declared window_size within the supplied archive that lead to memory corruption.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libarchive: 3.4.0

---

External links
http://github.com/libarchive/libarchive/releases/tag/v3.4.1
http://github.com/libarchive/libarchive/pull/1296
http://github.com/libarchive/libarchive/pull/1296/commits/c9267d665c30fa78023bd70b8e9c6f02450777e2

---

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.