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CVE-2016-5699

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Date: September 2, 2016

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.

Language: Python

Severity Score

Related Resources (24)

https://nvd.nist.gov/vuln/detail/CVE-2016-5699
http://rhn.redhat.com/errata/RHSA-2016-1629.html
http://www.openwall.com/lists/oss-security/2016/06/16/2
http://rhn.redhat.com/errata/RHSA-2016-1630.html
https://lists.debian.org/debian-lts-announce/2019/02/msg00011.html
http://www.openwall.com/lists/oss-security/2016/06/15/12
http://rhn.redhat.com/errata/RHSA-2016-1626.html
http://www.splunk.com/view/SP-CAAAPSV
https://hg.python.org/cpython/raw-file/v2.7.10/Misc/NEWS
http://www.securityfocus.com/bid/91226
http://rhn.redhat.com/errata/RHSA-2016-1628.html
https://security-tracker.debian.org/tracker/CVE-2016-5699
https://access.redhat.com/security/cve/CVE-2016-5699
http://blog.blindspotsecurity.com/2016/06/advisory-http-header-injection-in.html
https://docs.python.org/3.4/whatsnew/changelog.html#python-3-4-4
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
http://www.splunk.com/view/SP-CAAAPUE
https://hg.python.org/cpython/rev/1c45047c5102
http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
http://rhn.redhat.com/errata/RHSA-2016-1627.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2016-5699
http://www.openwall.com/lists/oss-security/2016/06/14/7
https://hg.python.org/cpython/rev/bf3e1c9b80e9
https://www.mend.io/vulnerability-database/CVE-2016-5699

Severity Score

Weakness Type (CWE)

Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting')

CWE-113

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): CHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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