CVE-2016-8616

Name: CVE-2016-8616
Creator: NVD / NIST
Published: 2018-08-01T06:29:00.287+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.47%

Last modified Jun 17, 2026

CVE-2016-8616 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 3.47% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

3.47%

87.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Haxx	Curl	< 7.51.0

References

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

Timeline

Published: Aug 1, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-8616?

How severe is CVE-2016-8616?

Severity scoring for CVE-2016-8616 is pending analysis. The EPSS model estimates a 3.47% probability of exploitation in the next 30 days.

How do I fix CVE-2016-8616?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-8616?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST