#VU1144 URL redirection in libcurl - CVE-2016-8624
Published: November 3, 2016 / Updated: November 4, 2016
Vulnerability identifier: #VU1144
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2016-8624
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
libcurl
libcurl
Software vendor:
curl.haxx.se
curl.haxx.se
Description
The vulnerability allows a remote attacker to perform phishing attacks.
The vulnerability is caused by an error when parsing URL. A remote attacker can supply a link with ending "#" character in hostname and cause libcurl client to redirect to a host, specified after the "#" character.
Exploit example:
http://example.com#@evilsite.com/1.txt
The above URL will force libcurl client to connect to evilsite.com hostname instead of example.com.
The vulnerability allows an attacker to perform phishing attacks by tricking victims to connect to untrusted host.
Remediation
The vulnerability is fixed in libcurl 7.51.0:
https://curl.haxx.se/CVE-2016-8625.patch