PT-2015-4013 · Curl+6 · Libcurl+6
Andrey Labunets
·
Published
2014-11-05
·
Updated
2024-06-15
·
CVE-2014-8150
CVSS v2.0
4.3
Medium
| Vector | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Name of the Vulnerable Software and Affected Versions
libcurl versions 6.0 through 7.x before 7.40.0
Description
The issue allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via CRLF sequences in a URL when using an HTTP proxy. This occurs because libcurl copies the entire URL into the request and sends it to the proxy, including any line feeds and carriage returns present in the URL. This can be exploited by malicious users to send additional requests or insert request headers that the program did not intend, particularly in programs that allow external sources to set or provide partial pieces for the URL.
Recommendations
For libcurl versions 6.0 through 7.x before 7.40.0, update to version 7.40.0 or later to resolve the issue. As a temporary workaround, consider validating and stripping URLs of CRLF sequences before sending them to the proxy to minimize the risk of exploitation. Restrict access to the HTTP proxy to minimize the risk of malicious users injecting arbitrary HTTP headers.
Fix
HTTP Request/Response Smuggling
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Centos
Junos
Red Hat
Suse
Ubuntu
Libcurl