CVE-2016-5699

python: http protocol steam injection attack

Severity Score

6.1

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Vulnerabilidad de inyección CRLF en la función HTTPConnection.putheader en urllib2 y urllib en CPython (también conocido como Python) en versiones anteriores a 2.7.10 y 3.x en versiones anteriores a 3.4.4 permite a atacantes remotos inyectar cabeceras HTTP arbitrarias a través de secuencias CRLF en una URL.

It was found that the Python's httplib library (used by urllib, urllib2 and others) did not properly check HTTPConnection.putheader() function arguments. An attacker could use this flaw to inject additional headers in a Python application that allowed user provided header names or values.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-06-16 CVE Reserved
2016-06-28 First Exploit
2016-08-21 CVE Published
2024-08-06 CVE Updated
2024-08-12 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-20: Improper Input Validation
CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')

CAPEC

References (22)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2016/06/14/7	Mailing List
http://www.openwall.com/lists/oss-security/2016/06/15/12	Mailing List
http://www.openwall.com/lists/oss-security/2016/06/16/2	Mailing List
http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html	X_refsource_confirm
http://www.securityfocus.com/bid/91226	Vdb Entry
http://www.splunk.com/view/SP-CAAAPSV	X_refsource_confirm
http://www.splunk.com/view/SP-CAAAPUE	X_refsource_confirm
https://docs.python.org/3.4/whatsnew/changelog.html#python-3-4-4	Release Notes
https://hg.python.org/cpython/raw-file/v2.7.10/Misc/NEWS	Release Notes
https://lists.debian.org/debian-lts-announce/2019/02/msg00011.html	Mailing List

URL	Date	SRC
https://github.com/bunseokbot/CVE-2016-5699-poc	2016-06-28
http://blog.blindspotsecurity.com/2016/06/advisory-http-header-injection-in.html	2024-08-06

URL	Date	SRC
https://hg.python.org/cpython/rev/1c45047c5102	2023-02-12
https://hg.python.org/cpython/rev/bf3e1c9b80e9	2023-02-12

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html	2023-02-12
http://rhn.redhat.com/errata/RHSA-2016-1626.html	2023-02-12
http://rhn.redhat.com/errata/RHSA-2016-1627.html	2023-02-12
http://rhn.redhat.com/errata/RHSA-2016-1628.html	2023-02-12
http://rhn.redhat.com/errata/RHSA-2016-1629.html	2023-02-12
http://rhn.redhat.com/errata/RHSA-2016-1630.html	2023-02-12
https://access.redhat.com/security/cve/CVE-2016-5699	2016-08-18
https://bugzilla.redhat.com/show_bug.cgi?id=1303699	2016-08-18

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				<= 2.7.9 Search vendor "Python" for product "Python" and version " <= 2.7.9"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.0 Search vendor "Python" for product "Python" and version "3.0"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.0.1 Search vendor "Python" for product "Python" and version "3.0.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.1.0 Search vendor "Python" for product "Python" and version "3.1.0"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.1.1 Search vendor "Python" for product "Python" and version "3.1.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.1.2 Search vendor "Python" for product "Python" and version "3.1.2"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.1.3 Search vendor "Python" for product "Python" and version "3.1.3"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.1.4 Search vendor "Python" for product "Python" and version "3.1.4"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.1.5 Search vendor "Python" for product "Python" and version "3.1.5"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.2.0 Search vendor "Python" for product "Python" and version "3.2.0"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.2.1 Search vendor "Python" for product "Python" and version "3.2.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.2.2 Search vendor "Python" for product "Python" and version "3.2.2"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.2.3 Search vendor "Python" for product "Python" and version "3.2.3"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.2.4 Search vendor "Python" for product "Python" and version "3.2.4"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.2.5 Search vendor "Python" for product "Python" and version "3.2.5"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.2.6 Search vendor "Python" for product "Python" and version "3.2.6"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.3.0 Search vendor "Python" for product "Python" and version "3.3.0"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.3.1 Search vendor "Python" for product "Python" and version "3.3.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.3.2 Search vendor "Python" for product "Python" and version "3.3.2"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.3.3 Search vendor "Python" for product "Python" and version "3.3.3"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.3.4 Search vendor "Python" for product "Python" and version "3.3.4"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.3.5 Search vendor "Python" for product "Python" and version "3.3.5"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.3.6 Search vendor "Python" for product "Python" and version "3.3.6"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.4.0 Search vendor "Python" for product "Python" and version "3.4.0"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.4.1 Search vendor "Python" for product "Python" and version "3.4.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.4.2 Search vendor "Python" for product "Python" and version "3.4.2"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.4.3 Search vendor "Python" for product "Python" and version "3.4.3"		-		Affected