What’s Vulnerable › Vulnerabilities

CVE-2016-0746

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 8.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-02-15 · updated 2026-06-17
• Weakness: CWE-416

Description

Use-after-free vulnerability in the resolver in nginx 0.6.18 through 1.8.0 and 1.9.x before 1.9.10 allows remote attackers to cause a denial of service (worker process crash) or possibly have unspecified other impact via a crafted DNS response related to CNAME response processing.

Affected products

• Apple Xcode: before 13.0 — fixed in 13.0
• Canonical Ubuntu Linux: 14.04, 15.10
• Debian Linux: 7.0, 8.0, 9.0
• nginx: from 0.6.18 through 1.8.0; from 1.9.0 before 1.9.10 — fixed in 1.9.10
• openSUSE Leap: 42.1

How to fix

Upgrade to a fixed version: Apple Xcode 13.0; nginx 1.9.10. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-updates/2016-02/msg00042.html
• http://mailman.nginx.org/pipermail/nginx/2016-January/049700.html
• http://seclists.org/fulldisclosure/2021/Sep/36
• 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
• https://support.apple.com/kb/HT212818
• http://lists.opensuse.org/opensuse-updates/2016-02/msg00042.html

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