Description
The ConnectionExists function in lib/url.c in libcurl before 7.47.0 does not properly re-use NTLM-authenticated proxy connections, which might allow remote attackers to authenticate as other users via a request, a similar issue to CVE-2014-0015.
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 | 7.47.0-1 | — |
| Debian 13 | curl | 7.47.0-1 | — |
| Debian 12 | curl | 7.47.0-1 | — |
| Debian 8 | curl | 7.38.0-4+deb8u3 | DSA-3455-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | curl | 7.35.0-1ubuntu2.6 | USN-2882-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | curl | 7.37.0-18.1 | SUSE-SU-2016:0340-1 |
| SLES 12 | curl | 7.37.0-18.1 | SUSE-SU-2016:0340-1 |
| SLES 11 SP4 | curl | 7.19.7-1.46.1 | SUSE-SU-2016:0347-1 |
| SLES 11 SP3 | curl | 7.19.7-1.46.1 | SUSE-SU-2016:0347-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | curl | 7.37.0-18.1 | SUSE-SU-2016:0340-1 |
| SLES for SAP 12 | curl | 7.37.0-18.1 | SUSE-SU-2016:0340-1 |
| SLES for SAP 11 SP4 | curl | 7.19.7-1.46.1 | SUSE-SU-2016:0347-1 |
| SLES for SAP 11 SP3 | curl | 7.19.7-1.46.1 | SUSE-SU-2016:0347-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | curl | 7.51.0-1.1 | openSUSE-SU-2024:10303-1 |
Advisories 5
- USN-2882-1 curl vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3455-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:0340-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0347-1 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
References
- FEDORA-2016-57bebab3b6 vendor-advisory
- http://packetstormsecurity.com/files/135695/Slackware-Security-Advisory-curl-Updates.html
- openSUSE-SU-2016:0360 vendor-advisory
- FEDORA-2016-3fa315a5dd vendor-advisory
- APPLE-SA-2016-09-20 vendor-advisory
- http://curl.haxx.se/docs/adv_20160127A.html
- SSA:2016-039-01 vendor-advisory
- DSA-3455 vendor-advisory
- openSUSE-SU-2016:0376 vendor-advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- 82307 vdb-entry
- https://support.apple.com/HT207170
- openSUSE-SU-2016:0373 vendor-advisory
- 1034882 vdb-entry
- FEDORA-2016-5a141de5d9 vendor-advisory
- USN-2882-1 vendor-advisory
- GLSA-201701-47 vendor-advisory
- FEDORA-2016-55137a3adb vendor-advisory