Description
CRLF injection vulnerability in libcurl 6.0 through 7.x before 7.40.0, when using an HTTP proxy, allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via CRLF sequences in a URL.
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 | 7.38.0-4 | — |
| Debian 13 | curl | 7.38.0-4 | — |
| Debian 12 | curl | 7.38.0-4 | — |
| Debian 7 | curl | 7.26.0-1+wheezy12 | DSA-3122-1 |
| Debian 6.0 | curl | 7.21.0-2.1+squeeze11 | DLA-134-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | curl | 7.35.0-1ubuntu2.3 | USN-2474-1 |
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 |
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 7
- 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-2474-1 curl vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3122-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-134-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 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
- 62361 third-party-advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10131
- FEDORA-2015-6853 vendor-advisory
- http://advisories.mageia.org/MGASA-2015-0020.html
- 71964 vdb-entry
- http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
- 1032768 vdb-entry
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- FEDORA-2015-0418 vendor-advisory
- http://curl.haxx.se/docs/adv_20150108B.html
- APPLE-SA-2015-08-13-2 vendor-advisory
- RHSA-2015:1254 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10743
- openSUSE-SU-2015:0248 vendor-advisory
- https://support.apple.com/kb/HT205031
- FEDORA-2015-0415 vendor-advisory
- USN-2474-1 vendor-advisory
- GLSA-201701-47 vendor-advisory
- FEDORA-2015-6864 vendor-advisory
- MDVSA-2015:021 vendor-advisory
- 62075 third-party-advisory
- DSA-3122 vendor-advisory
- 61925 third-party-advisory