Out-of-bounds read in Nagios

1) Out-of-bounds read

EUVDB-ID: #VU32582

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-7205

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition when processing a long string in the last key value in the variable list, which triggers a heap-based buffer over-read within the Off-by-one error in the process_cgivars function in contrib/daemonchk.c. A remote attacker can create a specially crafted file, pass it to the application, trigger out-of-bounds read error and crash the affected application.

Mitigation

Install update from vendor's website.

Vulnerable software versions

lighttpd: 1.4.40

External links

http://secunia.com/advisories/55976
http://sourceforge.net/p/nagios/nagioscore/ci/d97e03f32741a7d851826b03ed73ff4c9612a866/
http://www.mandriva.com/security/advisories?name=MDVSA-2014:004
http://www.openwall.com/lists/oss-security/2013/12/24/1
http://www.securityfocus.com/bid/64489
http://lists.debian.org/debian-lts-announce/2018/12/msg00014.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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