Vulnerability identifier: #VU64889

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-12418

CWE-ID: CWE-835

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
junrar
Universal components / Libraries / Libraries used by multiple products

Vendor: junrar

Description

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

The vulnerability exists due to infinite loop in archive.java in Junrar when handling corrupt RAR files. A local attacker can trick the victim into opening a specially crafted RAR file and cause denial of service conditions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

junrar: 0.6 - 1.0.0

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External links
http://github.com/junrar/junrar/commit/ad8d0ba8e155630da8a1215cee3f253e0af45817
http://github.com/junrar/junrar/pull/8
http://bugzilla.redhat.com/show_bug.cgi?id=1591917

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.