CVE-2016-8616

A flaw was found in curl before version 7.51.0 When re-using a connection, curl was doing case insensitive comparisons of user name and password with the existing connections. This means that if an unused connection with proper credentials exists for a protocol that has connection-scoped credentials, an attacker can cause that connection to be reused if s/he knows the case-insensitive version of the correct password.

• CWE-592
• CWE-255

• http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.htmlPatch
• http://www.securityfocus.com/bid/94094Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1037192Third Party Advisory, VDB Entry
• https://access.redhat.com/errata/RHSA-2018:2486Third Party Advisory
• https://access.redhat.com/errata/RHSA-2018:3558Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8616Issue Tracking, Patch, Vendor Advisory
• https://curl.haxx.se/CVE-2016-8616.patchPatch, Vendor Advisory
• https://curl.haxx.se/docs/adv_20161102B.htmlPatch, Vendor Advisory
• https://security.gentoo.org/glsa/201701-47Third Party Advisory
• https://www.tenable.com/security/tns-2016-21Third Party Advisory
• http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.htmlPatch
• http://www.securityfocus.com/bid/94094Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1037192Third Party Advisory, VDB Entry
• https://access.redhat.com/errata/RHSA-2018:2486Third Party Advisory
• https://access.redhat.com/errata/RHSA-2018:3558Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8616Issue Tracking, Patch, Vendor Advisory
• https://curl.haxx.se/CVE-2016-8616.patchPatch, Vendor Advisory
• https://curl.haxx.se/docs/adv_20161102B.htmlPatch, Vendor Advisory
• https://security.gentoo.org/glsa/201701-47Third Party Advisory
• https://www.tenable.com/security/tns-2016-21Third Party Advisory

Published

Aug 1, 2018

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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