#VU56736 Use-after-free in nginx - CVE-2016-0746
Published: September 21, 2021
Vulnerability identifier: #VU56736
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2016-0746
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
nginx
nginx
Software vendor:
F5 Networks
F5 Networks
Description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when processing a crafted DNS response related to CNAME response processing within the resolver in nginx. A remote attacker can send a specially crafted DNS response to the affected server, trigger a use-after-free error and perform a denial of service attack or execute arbitrary code on the system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Remediation
Install updates from vendor's website.
External links
- http://lists.opensuse.org/opensuse-updates/2016-02/msg00042.html
- http://mailman.nginx.org/pipermail/nginx/2016-January/049700.html
- http://www.debian.org/security/2016/dsa-3473
- http://www.securitytracker.com/id/1034869
- http://www.ubuntu.com/usn/USN-2892-1
- https://access.redhat.com/errata/RHSA-2016:1425
- https://bto.bluecoat.com/security-advisory/sa115
- https://bugzilla.redhat.com/show_bug.cgi?id=1302588
- https://security.gentoo.org/glsa/201606-06