Vulnerability identifier: #VU21054

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-13452

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Xymon
Web applications / Remote management & hosting panels

Vendor: GNU

Description

The vulnerability allows a remote attacker to cause a denial of service (DoS) condition on the target system.

The vulnerability exists due to insufficient validation of user-supplied input in the "reportlog.c" file. A remote attacker can submit malicious input, trigger memory corruption and cause a denial of service condition on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Xymon: 4.0.0 - 4.3.28

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External links
http://github.com/svn2github/xymon/blob/master/branches/4.3.28/web/reportlog.c
http://lists.debian.org/debian-lts-announce/2019/08/msg00032.html
http://lists.xymon.com/archive/2019-July/046570.html

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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.