CVE-2015-3143: Apple Mac OS X

Medium severity, CVSS 5.0. EPSS: 12.8% chance of exploitation in the next 30 days.

cURL and libcurl 7.10.6 through 7.41.0 does not properly re-use NTLM connections, which allows remote attackers to connect as other users via an unauthenticated request, a similar issue to CVE-2014-0015.

Affected products

• Apple Mac OS X: up to and including 10.9.5; version 10.10.0 only; version 10.10.1 only; version 10.10.2 only; version 10.10.3 only; version 10.10.4 only
• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 14.10 only; version 15.04 only
• Debian Debian Linux: version 7.0 only
• Haxx Curl: version 7.10.6 only; version 7.10.7 only; version 7.10.8 only; version 7.11.0 only; version 7.11.1 only; version 7.11.2 only; …
• Haxx Libcurl: version 7.10.6 only; version 7.10.7 only; version 7.10.8 only; version 7.11.0 only; version 7.11.1 only; version 7.11.2 only; …
• HP System Management Homepage: up to and including 7.5.3.1

Published 2015-04-24. Last modified 2026-06-17.