#VU19932 Improper Resource Shutdown or Release in YARA


Published: 2019-08-05

Vulnerability identifier: #VU19932

Vulnerability risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-5020

CWE-ID: CWE-404

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
YARA
Server applications / Server solutions for antivurus protection

Vendor: VirusTotal

Description

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

The vulnerability exists in the object lookup functionality due to the software reads a negative value to satisfy an assert. A remote attacker can send a specially crafted binary file and cause a DoS condition on the targeted system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

YARA: 3.8.1

External links
http://talosintelligence.com/vulnerability_reports/TALOS-2019-0781
http://github.com/virustotal/yara/releases/tag/v3.10.0
http://github.com/VirusTotal/yara/commit/1ecb0e66431bf5c5b4c2fdf622be969eb5f4a7cc

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. However, proof of concept for this vulnerability is available.


Latest bulletins with this vulnerability


Denial of service in Yara