Description
cURL and libcurl 7.10.6 through 7.34.0, when more than one authentication method is enabled, re-uses NTLM connections, which might allow context-dependent attackers to authenticate 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 | 7.35.0-1 | — |
| Debian 13 | curl | 7.35.0-1 | — |
| Debian 12 | curl | 7.35.0-1 | — |
| Debian 7 | curl | 7.26.0-1+wheezy8 | DSA-2849-1 |
| Debian 6.0 | curl | 7.21.0-2.1+squeeze7 | DSA-2849-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | curl +2 | 7.19.7-37.el6_5.3 | RHSA-2014:0561 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | curl | 7.51.0-1.1 | openSUSE-SU-2024:10303-1 |
Advisories 4
- RHSA-2014:0561 Red Hat Security Advisory: curl security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2849-1 curl - information disclosure 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
- WID-SEC-2023-1654 cURL: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Jul 4, 2023
References
- 56912 third-party-advisory
- http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5095862
- SSA:2014-044-01 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- http://support.apple.com/kb/HT6296
- http://www.vmware.com/security/advisories/VMSA-2014-0012.html
- 1029710 vdb-entry
- FEDORA-2014-1876 vendor-advisory
- openSUSE-SU-2014:0274 vendor-advisory
- APPLE-SA-2014-06-30-2 vendor-advisory
- 20141205 NEW: VMSA-2014-0012 - VMware vSphere product updates address security vulnerabilities mailing-list
- 65270 vdb-entry
- http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
- DSA-2849 vendor-advisory
- 59458 third-party-advisory
- 20141205 NEW: VMSA-2014-0012 - VMware vSphere product updates address security vulnerabilities mailing-list
- 56728 third-party-advisory
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10743
- http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
- FEDORA-2014-1864 vendor-advisory
- 59475 third-party-advisory
- http://curl.haxx.se/docs/adv_20140129.html
- USN-2097-1 vendor-advisory
- 56734 third-party-advisory
- 56731 third-party-advisory