Input validation error in Libxml2

1) Input validation error

EUVDB-ID: #VU32077

Risk: Medium

CVSSv3.1: 4.1 [CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-5969

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (NULL pointer dereference) via a crafted XML document.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Apache Tomcat: 6.0.19

External links

http://www.openwall.com/lists/oss-security/2016/11/05/3
http://www.openwall.com/lists/oss-security/2017/02/13/1
http://www.securityfocus.com/bid/96188
http://bugzilla.gnome.org/show_bug.cgi?id=778519
http://security.gentoo.org/glsa/201711-01

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

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.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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