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CVE-2011-2192

18
FAUCET Score

CVE-2011-2192 describes a vulnerability in libcurl versions 7.10.6 through 7.21.6, affecting products from Apple, Canonical, Debian, Fedora Project, and Haxx. The Curl_input_negotiate function in http_negotiate.c always performs credential delegation during GSSAPI authentication, enabling remote servers to impersonate clients. This vulnerability has a CVSS score of 4.3 (Medium), indicating a network-based attack with medium complexity, requiring no authentication, and potentially leading to partial confidentiality impact. The EPSS score is low, suggesting a minimal likelihood of exploitation. There is no evidence of active exploitation, no publicly available exploit code in Metasploit, Nuclei, or ExploitDB, and it has received no community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 7.10.6, <= 7.21.6CPE matchmatch criteria
cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*
< 10.7.3CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
14CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:14:*:*:*:*:*:*:*
15CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:15:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:5.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:P/I:N/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.99%
Probability of exploitation in next 30 days
EPSS Percentile
85.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0299 is in the 79th percentile among its peer group of 19,956 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

jitsipatch availablevia llm_extracted
Fixed in: 7.21.6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: curl-0:7.12.1-17.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: curl-0:7.15.5-9.el5_6.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: curl-0:7.19.7-26.el6_1.1
View patch
sierra_wirelesspatch availablevia llm_extracted
Fixed in: 7.21.6
View patch

Vendor Advisories (3)

redhatCVE-2011-2192Moderate

curl: Improper delegation of client credentials during GSS negotiation

Jun 23, 2011
sierra_wirelessllm-sierra_wireless-aa848c43e45e2063MEDIUM

inappropriate GSSAPI delegation

Jun 23, 2011
jitsillm-jitsi-47e2e94c68ab479dMEDIUM

inappropriate GSSAPI delegation

Jun 23, 2011

References

curl.haxx.se / curl-gssapi-delegation.patch
Broken Link
curl.haxx.se / docs/adv_20110623.html
Vendor Advisory
lists.apple.com / archives/security-announce/2012/Feb/msg00000.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2011-July/062287.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2011-June/061992.html
Mailing ListThird Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
secunia.com / advisories/45047
Third Party Advisory
secunia.com / advisories/45067
Third Party Advisory
secunia.com / advisories/45088
Third Party Advisory
secunia.com / advisories/45144
Third Party Advisory
secunia.com / advisories/45181
Third Party Advisory
secunia.com / advisories/48256
Third Party Advisory
security.gentoo.org / glsa/glsa-201203-02.xml
Third Party Advisory
support.apple.com / kb/HT5130
Third Party Advisory
debian.org / security/2011/dsa-2271
Third Party Advisory
mandriva.com / security/advisories
Third Party Advisory
redhat.com / support/errata/RHSA-2011-0918.html
Third Party Advisory
securitytracker.com / id
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-1158-1
Third Party Advisory