CVE-2016-6287

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-01-10 · updated 2026-06-17
Weakness: CWE-19

Description

The "http-client" egg always used a HTTP_PROXY environment variable to determine whether HTTP traffic should be routed via a proxy, even when running as a CGI process. Under several web servers this would mean a user-supplied "Proxy" header could allow an attacker to direct all HTTP requests through a proxy (also known as a "httpoxy" attack). This affects all versions of http-client before 0.10.

Affected products

Call-Cc Http-Client: through 0.9

References

http://lists.gnu.org/archive/html/chicken-announce/2016-07/msg00000.html
http://www.securityfocus.com/bid/92105
http://lists.gnu.org/archive/html/chicken-announce/2016-07/msg00000.html
http://www.securityfocus.com/bid/92105

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