CVE-2016-5699

Public Exploit

Description

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.

Category

6.1
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 10.22% Top 10%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory opensuse.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.splunk.com/view/SP-CAAAPUE
https://hg.python.org/cpython/rev/1c45047c5102 patch
http://rhn.redhat.com/errata/RHSA-2016-1630.html vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-1627.html vendor advisory
https://hg.python.org/cpython/rev/bf3e1c9b80e9 patch
http://rhn.redhat.com/errata/RHSA-2016-1629.html vendor advisory
http://www.splunk.com/view/SP-CAAAPSV
http://www.openwall.com/lists/oss-security/2016/06/16/2 mailing list
https://lists.debian.org/debian-lts-announce/2019/02/msg00011.html mailing list
http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
https://hg.python.org/cpython/raw-file/v2.7.10/Misc/NEWS release notes
https://docs.python.org/3.4/whatsnew/changelog.html#python-3-4-4 release notes
http://www.openwall.com/lists/oss-security/2016/06/15/12 mailing list
http://blog.blindspotsecurity.com/2016/06/advisory-http-header-injection-in.html third party advisory exploit
http://www.openwall.com/lists/oss-security/2016/06/14/7 mailing list
http://www.securityfocus.com/bid/91226 vdb entry
http://rhn.redhat.com/errata/RHSA-2016-1628.html vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-1626.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-5699?
CVE-2016-5699 has been scored as a medium severity vulnerability.
How to fix CVE-2016-5699?
To fix CVE-2016-5699, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-5699 being actively exploited in the wild?
It is possible that CVE-2016-5699 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~10% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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