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TI-2016-04949 Aliases CVE-2016-5699GHSA-mfrc-633m-gcwg

CRLF injection vulnerability in the HTTPConnection.putheader function in urllib2 and…

Priority LOW 39CWE-113Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Partial Red Hat: 24 fixed, 1 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.

Summary

CRLF injection vulnerability in the HTTPConnection.putheader function in urllib2 and urllib in CPython (aka Python) before 2.7.10 and 3.x before 3.4.4 allows remote attackers to inject arbitrary HTTP headers via CRLF sequences in a URL.

Why it matters now

EPSS 0.09887 95th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 5 advisoriesRed Hat: 24 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 27

CPEVersionsRoleVendor
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*up to 2.7.9Vulnerablepython-pillow
cpe:2.3:a:python:python:3.0:*:*:*:*:*:*:*3.0Vulnerablepython-pillow
cpe:2.3:a:python:python:3.0.1:*:*:*:*:*:*:*3.0.1Vulnerablepython-pillow
cpe:2.3:a:python:python:3.1.0:*:*:*:*:*:*:*3.1.0Vulnerablepython-pillow
cpe:2.3:a:python:python:3.1.1:*:*:*:*:*:*:*3.1.1Vulnerablepython-pillow
cpe:2.3:a:python:python:3.1.2:*:*:*:*:*:*:*3.1.2Vulnerablepython-pillow
cpe:2.3:a:python:python:3.1.3:*:*:*:*:*:*:*3.1.3Vulnerablepython-pillow
cpe:2.3:a:python:python:3.1.4:*:*:*:*:*:*:*3.1.4Vulnerablepython-pillow
cpe:2.3:a:python:python:3.1.5:*:*:*:*:*:*:*3.1.5Vulnerablepython-pillow
cpe:2.3:a:python:python:3.2.0:*:*:*:*:*:*:*3.2.0Vulnerablepython-pillow
  • cpe:2.3:a:python:python:*:*:*:*:*:*:*:* Versions up to 2.7.9 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.0.1:*:*:*:*:*:*:* Versions 3.0.1 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.1.0:*:*:*:*:*:*:* Versions 3.1.0 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.1.1:*:*:*:*:*:*:* Versions 3.1.1 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.1.2:*:*:*:*:*:*:* Versions 3.1.2 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.1.3:*:*:*:*:*:*:* Versions 3.1.3 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.1.4:*:*:*:*:*:*:* Versions 3.1.4 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.1.5:*:*:*:*:*:*:* Versions 3.1.5 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.2.0:*:*:*:*:*:*:* Versions 3.2.0 Vulnerable ·python-pillow
Show 17 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:python:python:3.2.1:*:*:*:*:*:*:*3.2.1Vulnerablepython-pillow
cpe:2.3:a:python:python:3.2.2:*:*:*:*:*:*:*3.2.2Vulnerablepython-pillow
cpe:2.3:a:python:python:3.2.3:*:*:*:*:*:*:*3.2.3Vulnerablepython-pillow
cpe:2.3:a:python:python:3.2.4:*:*:*:*:*:*:*3.2.4Vulnerablepython-pillow
cpe:2.3:a:python:python:3.2.5:*:*:*:*:*:*:*3.2.5Vulnerablepython-pillow
cpe:2.3:a:python:python:3.2.6:*:*:*:*:*:*:*3.2.6Vulnerablepython-pillow
cpe:2.3:a:python:python:3.3.0:*:*:*:*:*:*:*3.3.0Vulnerablepython-pillow
cpe:2.3:a:python:python:3.3.1:*:*:*:*:*:*:*3.3.1Vulnerablepython-pillow
cpe:2.3:a:python:python:3.3.2:*:*:*:*:*:*:*3.3.2Vulnerablepython-pillow
cpe:2.3:a:python:python:3.3.3:*:*:*:*:*:*:*3.3.3Vulnerablepython-pillow
cpe:2.3:a:python:python:3.3.4:*:*:*:*:*:*:*3.3.4Vulnerablepython-pillow
cpe:2.3:a:python:python:3.3.5:*:*:*:*:*:*:*3.3.5Vulnerablepython-pillow
cpe:2.3:a:python:python:3.3.6:*:*:*:*:*:*:*3.3.6Vulnerablepython-pillow
cpe:2.3:a:python:python:3.4.0:*:*:*:*:*:*:*3.4.0Vulnerablepython-pillow
cpe:2.3:a:python:python:3.4.1:*:*:*:*:*:*:*3.4.1Vulnerablepython-pillow
cpe:2.3:a:python:python:3.4.2:*:*:*:*:*:*:*3.4.2Vulnerablepython-pillow
cpe:2.3:a:python:python:3.4.3:*:*:*:*:*:*:*3.4.3Vulnerablepython-pillow
  • cpe:2.3:a:python:python:3.2.1:*:*:*:*:*:*:* Versions 3.2.1 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.2.2:*:*:*:*:*:*:* Versions 3.2.2 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.2.3:*:*:*:*:*:*:* Versions 3.2.3 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.2.4:*:*:*:*:*:*:* Versions 3.2.4 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.2.5:*:*:*:*:*:*:* Versions 3.2.5 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.2.6:*:*:*:*:*:*:* Versions 3.2.6 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.3.0:*:*:*:*:*:*:* Versions 3.3.0 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.3.1:*:*:*:*:*:*:* Versions 3.3.1 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.3.2:*:*:*:*:*:*:* Versions 3.3.2 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.3.3:*:*:*:*:*:*:* Versions 3.3.3 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.3.4:*:*:*:*:*:*:* Versions 3.3.4 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.3.5:*:*:*:*:*:*:* Versions 3.3.5 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.3.6:*:*:*:*:*:*:* Versions 3.3.6 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.4.0:*:*:*:*:*:*:* Versions 3.4.0 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.4.1:*:*:*:*:*:*:* Versions 3.4.1 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.4.2:*:*:*:*:*:*:* Versions 3.4.2 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.4.3:*:*:*:*:*:*:* Versions 3.4.3 Vulnerable ·python-pillow

Remediation

Red Hat 5 advisories

  • RHSA-2016:1629 Released 2016-08-18 · Red Hat rating Moderate
    python33-python security update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) python33-python-3.3.2-18.el6, python33-python-debug-3.3.2-18.el6, python33-python-devel-3.3.2-18.el6 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) python33-python-3.3.2-16.el7, python33-python-debug-3.3.2-16.el7, python33-python-devel-3.3.2-16.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6) python33-python-3.3.2-18.el6, python33-python-debug-3.3.2-18.el6, python33-python-devel-3.3.2-18.el6 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7) python33-python-3.3.2-18.el6, python33-python-debug-3.3.2-18.el6, python33-python-devel-3.3.2-18.el6 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.1) python33-python-3.3.2-16.el7, python33-python-debug-3.3.2-16.el7, python33-python-devel-3.3.2-16.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2) python33-python-3.3.2-16.el7, python33-python-debug-3.3.2-16.el7, python33-python-devel-3.3.2-16.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) python33-python-3.3.2-18.el6, python33-python-debug-3.3.2-18.el6, python33-python-devel-3.3.2-18.el6 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) python33-python-3.3.2-16.el7, python33-python-debug-3.3.2-16.el7, python33-python-devel-3.3.2-16.el7 +4
  • RHSA-2016:1630 Released 2016-08-18 · Red Hat rating Moderate
    rh-python34-python security update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) rh-python34-python-3.4.2-14.el6, rh-python34-python-debug-3.4.2-14.el6, rh-python34-python-devel-3.4.2-14.el6 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-python34-python-3.4.2-13.el7, rh-python34-python-debug-3.4.2-13.el7, rh-python34-python-devel-3.4.2-13.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6) rh-python34-python-3.4.2-14.el6, rh-python34-python-debug-3.4.2-14.el6, rh-python34-python-devel-3.4.2-14.el6 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7) rh-python34-python-3.4.2-14.el6, rh-python34-python-debug-3.4.2-14.el6, rh-python34-python-devel-3.4.2-14.el6 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.1) rh-python34-python-3.4.2-13.el7, rh-python34-python-debug-3.4.2-13.el7, rh-python34-python-devel-3.4.2-13.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2) rh-python34-python-3.4.2-13.el7, rh-python34-python-debug-3.4.2-13.el7, rh-python34-python-devel-3.4.2-13.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) rh-python34-python-3.4.2-14.el6, rh-python34-python-debug-3.4.2-14.el6, rh-python34-python-devel-3.4.2-14.el6 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-python34-python-3.4.2-13.el7, rh-python34-python-debug-3.4.2-13.el7, rh-python34-python-devel-3.4.2-13.el7 +4
  • RHSA-2016:1628 Released 2016-08-18 · Red Hat rating Moderate
    python27-python security update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) python27-python-2.7.8-18.el6, python27-python-debug-2.7.8-18.el6, python27-python-devel-2.7.8-18.el6 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) python27-python-2.7.8-16.el7, python27-python-debug-2.7.8-16.el7, python27-python-devel-2.7.8-16.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6) python27-python-2.7.8-18.el6, python27-python-debug-2.7.8-18.el6, python27-python-devel-2.7.8-18.el6 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7) python27-python-2.7.8-18.el6, python27-python-debug-2.7.8-18.el6, python27-python-devel-2.7.8-18.el6 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.1) python27-python-2.7.8-16.el7, python27-python-debug-2.7.8-16.el7, python27-python-devel-2.7.8-16.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2) python27-python-2.7.8-16.el7, python27-python-debug-2.7.8-16.el7, python27-python-devel-2.7.8-16.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) python27-python-2.7.8-18.el6, python27-python-debug-2.7.8-18.el6, python27-python-devel-2.7.8-18.el6 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) python27-python-2.7.8-16.el7, python27-python-debug-2.7.8-16.el7, python27-python-devel-2.7.8-16.el7 +4
Show 2 more Red Hat advisories
  • RHSA-2016:1626 Released 2016-08-18 · Red Hat rating Moderate
    python security update
    • Red Hat Enterprise Linux Client (v. 7) python-2.7.5-38.el7_2, python-libs-2.7.5-38.el7_2
    • Red Hat Enterprise Linux Client Optional (v. 7) python-debug-2.7.5-38.el7_2, python-devel-2.7.5-38.el7_2, python-test-2.7.5-38.el7_2 +2
    • Red Hat Enterprise Linux ComputeNode (v. 7) python-2.7.5-38.el7_2, python-devel-2.7.5-38.el7_2, python-libs-2.7.5-38.el7_2
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) python-debug-2.7.5-38.el7_2, python-test-2.7.5-38.el7_2, python-tools-2.7.5-38.el7_2 +1
    • Red Hat Enterprise Linux Desktop (v. 6) python-2.6.6-66.el6_8, python-libs-2.6.6-66.el6_8, tkinter-2.6.6-66.el6_8
    • Red Hat Enterprise Linux Desktop Optional (v. 6) python-devel-2.6.6-66.el6_8, python-test-2.6.6-66.el6_8, python-tools-2.6.6-66.el6_8
    • Red Hat Enterprise Linux HPC Node (v. 6) python-2.6.6-66.el6_8, python-devel-2.6.6-66.el6_8, python-libs-2.6.6-66.el6_8
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) python-test-2.6.6-66.el6_8, python-tools-2.6.6-66.el6_8, tkinter-2.6.6-66.el6_8
    • Red Hat Enterprise Linux Server (v. 6) python-2.6.6-66.el6_8, python-devel-2.6.6-66.el6_8, python-devel-2.6.6-66.el6_8.ppc +3
    • Red Hat Enterprise Linux Server (v. 7) python-2.7.5-38.el7_2, python-devel-2.7.5-38.el7_2, python-libs-2.7.5-38.el7_2 +1
    • Red Hat Enterprise Linux Server Optional (v. 6) python-test-2.6.6-66.el6_8, python-tools-2.6.6-66.el6_8, tkinter-2.6.6-66.el6_8
    • Red Hat Enterprise Linux Server Optional (v. 7) python-debug-2.7.5-38.el7_2, python-test-2.7.5-38.el7_2, python-tools-2.7.5-38.el7_2 +1
    • Red Hat Enterprise Linux Workstation (v. 6) python-2.6.6-66.el6_8, python-devel-2.6.6-66.el6_8, python-libs-2.6.6-66.el6_8 +1
    • Red Hat Enterprise Linux Workstation (v. 7) python-2.7.5-38.el7_2, python-devel-2.7.5-38.el7_2, python-libs-2.7.5-38.el7_2
    • Red Hat Enterprise Linux Workstation Optional (v. 6) python-test-2.6.6-66.el6_8, python-tools-2.6.6-66.el6_8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) python-debug-2.7.5-38.el7_2, python-test-2.7.5-38.el7_2, python-tools-2.7.5-38.el7_2 +1
  • RHSA-2016:1627 Released 2016-08-18 · Red Hat rating Moderate
    rh-python35-python security update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-python35-python-3.5.1-9.el7, rh-python35-python-debug-3.5.1-9.el7, rh-python35-python-devel-3.5.1-9.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.1) rh-python35-python-3.5.1-9.el7, rh-python35-python-debug-3.5.1-9.el7, rh-python35-python-devel-3.5.1-9.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2) rh-python35-python-3.5.1-9.el7, rh-python35-python-debug-3.5.1-9.el7, rh-python35-python-devel-3.5.1-9.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-python35-python-3.5.1-9.el7, rh-python35-python-debug-3.5.1-9.el7, rh-python35-python-devel-3.5.1-9.el7 +4

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2016:1626
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2016:1626
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2016:1626
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2016:1626
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2016:1626
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2016:1626
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2016:1626
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2016:1626
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2016:1626
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2016:1626
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2016:1626
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2016:1626
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2016:1626
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2016:1626
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2016:1626
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2016:1626
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2016:1628, RHSA-2016:1629, RHSA-2016:1630
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2016:1627, RHSA-2016:1628, RHSA-2016:1629, RHSA-2016:1630
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6)Fixed RHSA-2016:1628, RHSA-2016:1629, RHSA-2016:1630
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7)Fixed RHSA-2016:1628, RHSA-2016:1629, RHSA-2016:1630
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.1)Fixed RHSA-2016:1627, RHSA-2016:1628, RHSA-2016:1629, RHSA-2016:1630
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2)Fixed RHSA-2016:1627, RHSA-2016:1628, RHSA-2016:1629, RHSA-2016:1630
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2016:1628, RHSA-2016:1629, RHSA-2016:1630
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2016:1627, RHSA-2016:1628, RHSA-2016:1629, RHSA-2016:1630

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-5699
  2. 2026-10-03 Alias added: GHSA-mfrc-633m-gcwg

References

Exploit 1

Patch 2

Advisory 6

Other 9

  • TI-2016-01993 The DES and Triple DES ciphers, as used in the TLS, SSH, and IPSec protocols and other… CVSS 3.1HIGH 7.5
  • TI-2022-24108 An XML External Entity (XXE) issue was discovered in Python through 3.9.1. CVSS 3.1CRITICAL 9.8
  • TI-2022-17508 The Keccak XKCP SHA-3 reference implementation before fdc6fef has an integer overflow and… CVSS 3.1CRITICAL 9.8
  • TI-2021-02254 Python 3.x through 3.9.1 has a buffer overflow in PyCArg_repr in _ctypes/callproc.c… CVSS 3.1CRITICAL 9.8
  • TI-2007-04413 Directory traversal vulnerability in the (1) extract and (2) extractall functions in the… CVSS 3.1CRITICAL 9.8
  • TI-2014-00217 OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly… CVSS 3.1HIGH 7.4
See all 139 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences