Vulnerability identifier: #VU40384

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-2054

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Debian Linux
Operating systems & Components / Operating system
Xymon
Web applications / Remote management & hosting panels

Vendor: Debian
GNU

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Multiple buffer overflows in xymond/xymond.c in xymond in Xymon 4.1.x, 4.2.x, and 4.3.x before 4.3.25 allow remote attackers to execute arbitrary code or cause a denial of service (daemon crash) via a long filename, involving handling a "config" command.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Debian Linux: 8.0

Xymon: 4.1.0 - 8.0

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External links
http://lists.xymon.com/archive/2016-February/042986.html
http://packetstormsecurity.com/files/135758/Xymon-4.3.x-Buffer-Overflow-Code-Execution-Information-Disclosure.html
http://www.debian.org/security/2016/dsa-3495
http://www.securityfocus.com/archive/1/537522/100/0/threaded
http://sourceforge.net/p/xymon/code/7859/
http://sourceforge.net/p/xymon/code/7860/

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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.