#VU32074 Input validation error in expat - CVE-2016-5300

Vulnerability identifier: #VU32074

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-5300

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
expat
Universal components / Libraries / Libraries used by multiple products

Vendor: libexpat.org

Description

The vulnerability allows context-dependent 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 (CPU consumption) via crafted identifiers in an XML document.

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

Vulnerable software versions

expat: 11.0.5

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External links
https://www.debian.org/security/2016/dsa-3597
https://www.openwall.com/lists/oss-security/2016/06/04/4
https://www.openwall.com/lists/oss-security/2016/06/04/5
https://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
https://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
https://www.securityfocus.com/bid/91159
https://www.ubuntu.com/usn/USN-3010-1
https://security.gentoo.org/glsa/201701-21
https://source.android.com/security/bulletin/2016-11-01.html
https://www.tenable.com/security/tns-2016-20

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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.