Strix
26.1K

CVE-2016-4975

UnknownEPSS 19.80%

Last modified

CVE-2016-4975 is a vulnerability of currently unknown severity. 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. EPSS estimates a 19.80% chance of exploitation in the next 30 days.

Description

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).

Metrics

EPSS Probability
19.80%

97.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ApacheHttp Server2.2.0
ApacheHttp Server2.2.2
ApacheHttp Server2.2.3
ApacheHttp Server2.2.4
ApacheHttp Server2.2.6
ApacheHttp Server2.2.8
ApacheHttp Server2.2.9
ApacheHttp Server2.2.10
ApacheHttp Server2.2.11
ApacheHttp Server2.2.12
ApacheHttp Server2.2.13
ApacheHttp Server2.2.14
ApacheHttp Server2.2.15
ApacheHttp Server2.2.16
ApacheHttp Server2.2.17
ApacheHttp Server2.2.18
ApacheHttp Server2.2.19
ApacheHttp Server2.2.20
ApacheHttp Server2.2.21
ApacheHttp Server2.2.22
ApacheHttp Server2.2.23
ApacheHttp Server2.2.24
ApacheHttp Server2.2.25
ApacheHttp Server2.2.26
ApacheHttp Server2.2.27
ApacheHttp Server2.2.29
ApacheHttp Server2.2.31
ApacheHttp Server2.4.1
ApacheHttp Server2.4.2
ApacheHttp Server2.4.3
ApacheHttp Server2.4.4
ApacheHttp Server2.4.6
ApacheHttp Server2.4.7
ApacheHttp Server2.4.9
ApacheHttp Server2.4.10
ApacheHttp Server2.4.12
ApacheHttp Server2.4.16
ApacheHttp Server2.4.17
ApacheHttp Server2.4.18
ApacheHttp Server2.4.20
ApacheHttp Server2.4.23

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2016-4975?
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).
How severe is CVE-2016-4975?
Severity scoring for CVE-2016-4975 is pending analysis. The EPSS model estimates a 19.80% probability of exploitation in the next 30 days.
How do I fix CVE-2016-4975?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-4975?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST