CVE-2016-8616
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.
Does this matter?
Lower severity and a low EPSS score (3.47%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.0
- 5.9 MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 3.47% probability · 89th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-592, CWE-255
- Affected
- haxx/curl
- Source
- secalert@redhat.com
EPSS 3.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.