#VU6666 Denial of service in Zlib - CVE-2016-9843

Vulnerability identifier: #VU6666

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-9843

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

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

Vendor: GNU

Description
The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in zlib due to big-endian out-of-bounds pointer. A remote attacker can send a specially crafted document, trick the victim into opening it, and cause the application to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Zlib: 1.2.0 - 1.2.8

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External links
https://aix.software.ibm.com/aix/efixes/security/java_apr2017_advisory.asc

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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.