Description
cURL and libcurl 7.1 before 7.36.0, when using the OpenSSL, axtls, qsossl or gskit libraries for TLS, recognize a wildcard IP address in the subject's Common Name (CN) field of an X.509 certificate, which might allow man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.
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 | 7.36.0-1 | — |
| Debian 13 | curl | 7.36.0-1 | — |
| Debian 12 | curl | 7.36.0-1 | — |
| Debian 7 | curl | 7.26.0-1+wheezy9 | DSA-2902-1 |
| Debian 6.0 | curl | 7.21.0-2.1+squeeze8 | DSA-2902-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | curl | 7.51.0-1.1 | openSUSE-SU-2024:10303-1 |
| openSUSE Tumbleweed | lftp | 4.7.4-1.1 | openSUSE-SU-2024:10380-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | curl | 7.36.0-r0 | — |
| Alpine v3.23 | curl | 7.36.0-r0 | — |
| Alpine v3.22 | curl | 7.36.0-r0 | — |
| Alpine v3.21 | curl | 7.36.0-r0 | — |
| Alpine v3.20 | curl | 7.36.0-r0 | — |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | curl | 7.36.0-r0 | — |
| Alpine v3.18 | curl | 7.36.0-r0 | — |
| Alpine v3.17 | curl | 7.36.0-r0 | — |
| Alpine v3.16 | curl | 7.36.0-r0 | — |
| Alpine v3.15 | curl | 7.36.0-r0 | — |
| Alpine v3.14 | curl | 7.36.0-r0 | — |
| Alpine v3.13 | curl | 7.36.0-r0 | — |
| Alpine v3.12 | curl | 7.36.0-r0 | — |
| Alpine v3.11 | curl | 7.36.0 | — |
| Alpine v3.10 | curl | 7.36.0-r0 | — |
| Alpine v3.9 | curl | 7.36.0-r0 | — |
| Alpine v3.8 | curl | 7.36.0 | — |
| Alpine v3.7 | curl | 7.36.0 | — |
| Alpine v3.6 | curl | 7.36.0 | — |
| Alpine v3.5 | curl | 7.36.0-r0 | — |
| Alpine v3.4 | curl | 7.36.0-r0 | — |
Advisories 3
- DSA-2902-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10380-1 lftp-4.7.4-1.1 on GA media 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
- http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5095862
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- MDVSA-2015:213 vendor-advisory
- 57836 third-party-advisory
- http://curl.haxx.se/docs/adv_20140326B.html
- DSA-2902 vendor-advisory
- http://www.getchef.com/blog/2014/04/09/chef-server-11-0-12-release/
- 59458 third-party-advisory
- openSUSE-SU-2014:0530 vendor-advisory
- http://advisories.mageia.org/MGASA-2015-0165.html
- 58615 third-party-advisory
- 57968 third-party-advisory
- http://www-01.ibm.com/support/docview.wss?uid=swg21675820
- USN-2167-1 vendor-advisory
- http://www.getchef.com/blog/2014/04/09/enterprise-chef-11-1-3-release/
- http://www.getchef.com/blog/2014/04/09/enterprise-chef-1-4-9-release/
- 57966 third-party-advisory