HOMEVULNERABILITIESCVE-2016-6286
HIGH

CVE-2016-6286

CWE-19Published: January 10, 2017· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

The "spiffy-cgi-handlers" egg would convert a nonexistent "Proxy" header to the HTTP_PROXY environment variable, which would allow attackers to direct CGI programs which use this environment variable to use an attacker-specified HTTP proxy server (also known as a "httpoxy" attack). This affects all versions of spiffy-cgi-handlers before 0.5.

NVD Source

Technical Analysis

CVE-2016-6286 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

call-cc1 product(s)
http-client
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

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

All References (4)

→
http://lists.gnu.org/archive/html/chicken-announce/2016-07/msg00000.htmlMitigation · Third Party Advisory
→
http://www.securityfocus.com/bid/92105Third Party Advisory · VDB Entry
→
http://lists.gnu.org/archive/html/chicken-announce/2016-07/msg00000.htmlMitigation · Third Party Advisory
→
http://www.securityfocus.com/bid/92105Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2016-6286
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-19
CISA KEVNo
Affected1 vendor(s)
PublishedJan 10, 2017

Related CVEs (CWE-19)

CVE-2014-8822
10.0
CVE-2014-4488
10.0
CVE-2014-8817
10.0
CVE-2014-7247
10.0
CVE-1999-0226
10.0
CVE-2015-2373
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2016-6286 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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