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Fencer Intel
medium 5.3

CVE-2016-1000111 json

Forced Browsing in Twisted

published 6y ago modified 4mo ago also GHSA-3gqj-cmxr-p4x2 , PYSEC-2020-214 , EUVD-2020-0227

cvss
5.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.8%
EPSS 2.8% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

Twisted before 16.3.1 does not attempt to address RFC 3875 section 4.1.18 namespace conflicts and therefore does not protect CGI applications from the presence of untrusted client data in the HTTP_PROXY environment variable, which might allow remote attackers to redirect a CGI application's outbound HTTP traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP request, aka an "httpoxy" issue.

Patch / fix

  • pypi twisted 16.3.1
  • twisted twisted 16.3.1
  • twisted Debian 14, Debian 13, Debian 12 16.4.0-1

debian advisories DEBIAN-CVE-2016-1000111

  • twisted Ubuntu 14.04 LTS 13.2.0-1ubuntu1.2
  • twisted Ubuntu 16.04 LTS 16.0.0-1ubuntu0.2

ubuntu advisories UBUNTU-CVE-2016-1000111

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • pulp satellite capsule 6.1, satellite 6.1 2.8.7.18-1.el6sat
  • pulp satellite capsule 6.2, satellite 6.2 2.8.7.18-1.el7sat
  • foreman satellite capsule 6.1, satellite 6.1 1.11.0.86-1.el6sat
  • foreman satellite capsule 6.2, satellite 6.2 1.11.0.86-1.el7sat
  • katello satellite capsule 6.1, satellite 6.1 3.0.0-33.el6sat
  • katello satellite capsule 6.2, satellite 6.2 3.0.0-33.el7sat
  • candlepin satellite 6.1 0.9.54.26-1.el6
  • candlepin satellite 6.2 0.9.54.26-1.el7

red hat advisories RHSA-2018:0273RHSA-2016:1978

  • python-Twisted SLE Module for Web and Scripting 12, Enterprise Storage 4, Enterprise Storage 3 15.2.1-8.1

suse advisories SUSE-SU-2017:0114-1

  • python-Twisted openSUSE Tumbleweed 16.4.1-1.2

opensuse advisories openSUSE-SU-2024:10162-1

  • py3-twisted Alpine 3.24, Alpine 3.23, Alpine 3.22 +11 more 16.4.0-r0

alpine advisories ALPINE-CVE-2016-1000111

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2016-1000111 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-1000111 updated cvss 5.0

Twisted: sets environmental variable based on user supplied Proxy request header

  • Red Hat Enterprise Linux Client Optional (v. 7) python-twisted-web 12.1.0-5.el7_2 Red Hat Enterprise Linux Desktop (v. 6) python-twisted-web 8.2.0-5.el6_8 Red Hat Enterprise Linux Server (v. 6) python-twisted-web 8.2.0-5.el6_8 Red Hat Enterprise Linux Server Optional (v. 7) python-twisted-web 12.1.0-5.el7_2 Red Hat Enterprise Linux Workstation (v. 6) python-twisted-web 8.2.0-5.el6_8 Red Hat Enterprise Linux Workstation Optional (v. 7) python-twisted-web 12.1.0-5.el7_2
    fixed: vendor fix RHSA-2016:1978
  • Red Hat Satellite 6.2 pulp 2.8.7.18-1.el6sat, pulp 2.8.7.18-1.el7sat, qpid-proton 0.9-21.el6, qpid-proton 0.9-21.el7, katello 3.0.0-33.el6sat, katello 3.0.0-33.el7sat, +94 more Red Hat Satellite Capsule 6.2 pulp 2.8.7.18-1.el6sat, pulp 2.8.7.18-1.el7sat, qpid-proton 0.9-21.el6, qpid-proton 0.9-21.el7, katello 3.0.0-33.el6sat, katello 3.0.0-33.el7sat, +67 more
    fixed: vendor fix RHSA-2018:0273

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.76% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N
GitHub 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
pypi twisted
<16.3.1
16.3.1

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.