#VU6664 Denial of service in Zlib - CVE-2016-9841

Vulnerability identifier: #VU6664

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-2016-9841

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 out-of-bounds pointer arithmetic in inftrees.c. A remote attacker can 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://github.com/madler/zlib/commit/9aaec95e82117c1cb0f9624264c3618fc380cecb
https://bugzilla.redhat.com/show_bug.cgi?id=1402346

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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.