Medium severity · published Aug 14, 2018
CVE-2016-4975
mod_userdir CRLF injection
6.1
CVSS
19.8%
EPSS
No
On KEV
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).
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)19.8% · higher than 97% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HS
HTTP Server · Apache
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) · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-4975
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-4975
Third Party Advisory
http://www.securityfocus.com/bid/105093
Vendor Advisory
https://httpd.apache.org/security/vulnerabilities_22.html#CVE-2016-4975
Vendor Advisory
https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2016-4975
lists.apache.org
https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E
lists.apache.org
https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E
lists.apache.org
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E
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