Auth bypass in Haxx Curl
CVE-2016-0755
The ConnectionExists function in lib/url.c in libcurl before 7.47.0 does not properly re-use NTLM-authenticated proxy connections, which might allow remote attackers to authenticate as other users via a request, a similar issue to CVE-2014…
Vulnerability class: Broken Authentication
EPSS: 0.003 (57.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Haxx Curl
- Canonical Ubuntu_linux — versions 12.04, 14.04, 15.04
- Debian Debian_linux — versions 7.0
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- FEDORA-2016-57bebab3b6 (x_refsource_FEDORA, vendor-advisory)
- secalert@redhat.com (x_refsource_MISC)
- openSUSE-SU-2016:0360 (vendor-advisory, x_refsource_SUSE)
- FEDORA-2016-3fa315a5dd (x_refsource_FEDORA, vendor-advisory)
- APPLE-SA-2016-09-20 (vendor-advisory, x_refsource_APPLE)
- secalert@redhat.com (x_refsource_CONFIRM, Vendor Advisory)
- SSA:2016-039-01 (vendor-advisory, x_refsource_SLACKWARE)
- DSA-3455 (vendor-advisory, x_refsource_DEBIAN)
- openSUSE-SU-2016:0376 (vendor-advisory, x_refsource_SUSE)
- secalert@redhat.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2016-0755?
- CVE-2016-0755 is a high-severity vulnerability in Haxx Curl, classified under Improper Authentication. CVSS score: 7.3/10. Published 2016-01-29.
- How severe is CVE-2016-0755?
- High severity. CVSS v3 base score is 7.3 out of 10.
- Is CVE-2016-0755 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.