Multiple vulnerabilities in Xcftools

Published: 2019-11-22

Risk	High
Patch available	NO
Number of vulnerabilities	2
CVE-ID	CVE-2019-5086 CVE-2019-5087
CWE-ID	CWE-190
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	xcftools Client/Desktop applications / Software for system administration
Vendor	Henning Makholm

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Integer overflow

EUVDB-ID: #VU22913

Risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C]

CVE-ID: CVE-2019-5086

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow in the "flattenIncrementally" function in the "xcf2png" and "xcf2pnm" binaries. A remote attacker can trick a victim to open a specially crafted XCF file, trigger integer overflow and execute arbitrary code on the target system.

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

Note: An integer overflow can occur while walking through tiles.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

xcftools: 1.0.7

External links

http://www.talosintelligence.com/vulnerability_reports/TALOS-2019-0878

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.

2) Integer overflow

EUVDB-ID: #VU22912