CVE-2016-4975 - Improper Neutralization of CRLF Sequences ('CRLF Injection')

Severity

43%

Complexity

86%

Confidentiality

48%

Possible CRLF injection allowing HTTP response splitting attacks for sites which use mod_userdir. This issue was mitigated by changes made in 2.4.25 and 2.2.32 which prohibit CR or LF injection into the "Location" or other outbound header key or value. Fixed in Apache HTTP Server 2.4.25 (Affected 2.4.1-2.4.23). Fixed in Apache HTTP Server 2.2.32 (Affected 2.2.0-2.2.31).

CVSS 3.0 Base Score 6.1. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).

CVSS 2.0 Base Score 4.3. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:P/A:N).

Demo Examples

Improper Neutralization of CRLF Sequences ('CRLF Injection')

CWE-93

If user input data that eventually makes it to a log message isn't checked for CRLF characters, it may be possible for an attacker to forge entries in a log file.


               logger.info("User's street address: " + request.getParameter("streetAddress"));

Overview

Type

Apache

First reported 6 years ago

2018-08-14 12:29:00

Last updated 6 years ago

2019-02-07 11:29:00

Affected Software

Apache Software Foundation Apache HTTP Server 2.2.0

2.2.0

Apache Software Foundation Apache HTTP Server 2.2.2

2.2.2

Apache Software Foundation Apache HTTP Server 2.2.3

2.2.3

Apache Software Foundation Apache HTTP Server 2.2.4

2.2.4

Apache Software Foundation Apache HTTP Server 2.2.6

2.2.6

Apache Software Foundation Apache HTTP Server 2.2.8

2.2.8

Apache Software Foundation Apache HTTP Server 2.2.9

2.2.9

Apache Software Foundation Apache HTTP Server 2.2.10

2.2.10

Apache Software Foundation Apache HTTP Server 2.2.11

2.2.11

Apache Software Foundation Apache HTTP Server 2.2.12

2.2.12

Apache Software Foundation Apache HTTP Server 2.2.13

2.2.13

Apache Software Foundation Apache HTTP Server 2.2.14

2.2.14

Apache Software Foundation Apache HTTP Server 2.2.15

2.2.15

Apache Software Foundation Apache HTTP Server 2.2.16

2.2.16

Apache Software Foundation Apache HTTP Server 2.2.17

2.2.17

Apache Software Foundation Apache HTTP Server 2.2.18

2.2.18

Apache Software Foundation Apache HTTP Server 2.2.19

2.2.19

Apache Software Foundation Apache HTTP Server 2.2.20

2.2.20

Apache HTTP Server 2.2.21

2.2.21

Apache Software Foundation Apache HTTP Server 2.2.22

2.2.22

Apache Software Foundation Apache HTTP Server 2.2.23

2.2.23

Apache Software Foundation Apache HTTP Server 2.2.24

2.2.24

Apache Software Foundation Apache HTTP Server 2.2.25

2.2.25

Apache Software Foundation Apache HTTP Server 2.2.26

2.2.26

Apache Software Foundation Apache HTTP Server 2.2.27

2.2.27

Apache Software Foundation Apache HTTP Server 2.2.29

2.2.29

Apache Software Foundation Apache HTTP Server 2.2.31

2.2.31

Apache Software Foundation Apache HTTP Server 2.4.1

2.4.1

Apache Software Foundation Apache HTTP Server 2.4.2

2.4.2

Apache Software Foundation Apache HTTP Server 2.4.3

2.4.3

Apache Software Foundation Apache HTTP Server 2.4.4

2.4.4

Apache Software Foundation Apache HTTP Server 2.4.6

2.4.6

Apache Software Foundation Apache HTTP Server 2.4.7

2.4.7

Apache Software Foundation Apache HTTP Server 2.4.9

2.4.9

Apache Software Foundation Apache HTTP Server 2.4.10

2.4.10

Apache Software Foundation Apache HTTP Server 2.4.12

2.4.12

Apache Software Foundation Apache HTTP Server 2.4.16

2.4.16

Apache Software Foundation Apache HTTP Server 2.4.17

2.4.17

Apache Software Foundation Apache HTTP Server 2.4.18

2.4.18

Apache Software Foundation HTTP Server 2.4.20

2.4.20

Apache Software Foundation HTTP Server 2.4.23

2.4.23

References

[httpd-cvs] 20190815 svn commit: r1048743 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html

[httpd-cvs] 20190815 svn commit: r1048742 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html

[httpd-cvs] 20190815 svn commit: r1048743 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html

[httpd-cvs] 20190815 svn commit: r1048742 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html

[httpd-cvs] 20200401 svn commit: r1058586 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html

[httpd-cvs] 20200401 svn commit: r1058586 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html

[httpd-cvs] 20200401 svn commit: r1058587 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html

[httpd-cvs] 20200401 svn commit: r1058587 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html

https://security.netapp.com/advisory/ntap-20180926-0006/

Third Party Advisory