CVE-2011-2192

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-07-07 · updated 2026-06-16
Weakness: CWE-255

Description

The Curl_input_negotiate function in http_negotiate.c in libcurl 7.10.6 through 7.21.6, as used in curl and other products, always performs credential delegation during GSSAPI authentication, which allows remote servers to impersonate clients via GSSAPI requests.

Affected products

macOS: before 10.7.3 — fixed in 10.7.3
Canonical Ubuntu Linux: 8.04, 10.04, 10.10, 11.04
Debian Linux: 5.0, 6.0, 7.0
Fedoraproject Fedora: 14, 15
curl: from 7.10.6 through 7.21.6

How to fix

Upgrade to a fixed version: macOS 10.7.3. Check the vendor advisory for mitigations.

References

http://curl.haxx.se/curl-gssapi-delegation.patch
http://curl.haxx.se/docs/adv_20110623.html
http://lists.apple.com/archives/security-announce/2012/Feb/msg00000.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062287.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061992.html
http://secunia.com/advisories/45047
http://secunia.com/advisories/45067
http://secunia.com/advisories/45088
http://secunia.com/advisories/45144
http://secunia.com/advisories/45181
http://secunia.com/advisories/48256
http://security.gentoo.org/glsa/glsa-201203-02.xml

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