Description
cURL and libcurl 7.10.6 through 7.41.0 do not properly re-use authenticated Negotiate connections, which allows remote attackers to connect as other users via a request.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | curl | 7.42.0-1 | — |
| Debian 13 | curl | 7.42.0-1 | — |
| Debian 12 | curl | 7.42.0-1 | — |
| Debian 8 | curl | 7.38.0-4+deb8u1 | DSA-3232-1 |
| Debian 7 | curl | 7.26.0-1+wheezy13 | DSA-3232-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 6.0 | curl | 7.21.0-2.1+squeeze12 | DLA-211-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | curl | 7.35.0-1ubuntu2.5 | USN-2591-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | curl +2 | 7.29.0-25.el7 | RHSA-2015:2159 |
| RHEL 6 | curl +2 | 7.19.7-46.el6 | RHSA-2015:1254 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | curl | 7.37.0-15.1 | SUSE-SU-2015:0990-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 | curl | 7.37.0-15.1 | SUSE-SU-2015:0990-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | curl | 7.51.0-1.1 | openSUSE-SU-2024:10303-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | curl +2 | 7.29.0-25.0.1.el7 | ELSA-2015-2159 |
Advisories 8
- RHSA-2015:2159 Red Hat Security Advisory: curl security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2015:1254 Red Hat Security Advisory: curl security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-2591-1 curl vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3232-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-211-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2015:0990-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10303-1 curl-7.51.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2015-2159 Moderate: curl security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 23, 2015
References
- HPSBHF03544 vendor-advisory
- http://curl.haxx.se/docs/adv_20150422B.html
- FEDORA-2015-6853 vendor-advisory
- DSA-3232 vendor-advisory
- FEDORA-2015-6712 vendor-advisory
- 74301 vdb-entry
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- MDVSA-2015:219 vendor-advisory
- USN-2591-1 vendor-advisory
- 1032232 vdb-entry
- APPLE-SA-2015-08-13-2 vendor-advisory
- RHSA-2015:1254 vendor-advisory
- MDVSA-2015:220 vendor-advisory
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10743
- http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
- openSUSE-SU-2015:0799 vendor-advisory
- http://advisories.mageia.org/MGASA-2015-0179.html
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05045763
- https://support.apple.com/kb/HT205031
- GLSA-201509-02 vendor-advisory
- FEDORA-2015-6728 vendor-advisory
- FEDORA-2015-6695 vendor-advisory
- FEDORA-2015-6864 vendor-advisory