Improper Authentication in cURL - CVE-2016-0755

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Main Vulnerability Database Vulnerabilities #VU33077

Improper Authentication in cURL - CVE-2016-0755

Published: January 29, 2016 / Updated: August 3, 2020


Vulnerability identifier: #VU33077
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2016-0755
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

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-2014-0015.


Affected software

cURL
Amazon Linux AMI
Slackware Linux
Fedora
curl (Alpine package)
curl
mingw-curl

How to mitigate CVE-2016-0755

Install update from vendor's website.

cURL - update to 7.47.0
curl (Alpine package) - update to 7.47.0-r0
curl - addressed in versions 7.40.0-8.fc22, 7.43.0-5.fc23
mingw-curl - addressed in versions 7.47.0-1.fc22, 7.47.0-1.fc23

External References

Related Security Bulletins