CVE-2020-5247

Description

In Puma (RubyGem) before 4.3.2 and before 3.12.3, if an application using Puma allows untrusted input in a response header, an attacker can use newline characters (i.e. CR, LF or/r, /n) to end the header and inject malicious content, such as additional headers or an entirely new response body. This vulnerability is known as HTTP Response Splitting. While not an attack in itself, response splitting is a vector for several other attacks, such as cross-site scripting (XSS). This is related to CVE-2019-16254, which fixed this vulnerability for the WEBrick Ruby web server. This has been fixed in versions 4.3.2 and 3.12.3 by checking all headers for line endings and rejecting headers with those characters.

Risk Information

Base Score

7.5

MODERATE

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Score

Exploitation Probability

2.094

Associated Vulnerability

Vulnerability	OS Platform
Vulnerabilities CVE-2020-5249,CVE-2020-5247 are fixed in Ruby-puma 3.12.4	Windows
Vulnerabilities CVE-2020-5249,CVE-2020-5247 are fixed in Ruby-puma 4.3.3	Windows
Multiple Vulnerabilities are affected in IBM Operational Decision Manager 8.11.0.1	Windows
Multiple Vulnerabilities are affected in IBM Operational Decision Manager 8.11.1	Windows
Multiple Vulnerabilities are affected in IBM Operational Decision Manager 8.10.4	Windows
Multiple Vulnerabilities are affected in IBM Operational Decision Manager 8.10.5.2	Windows
Multiple Vulnerabilities are affected in IBM Operational Decision Manager 8.12.0.1	Windows
Vulnerabilities CVE-2020-5249,CVE-2020-5247 are fixed in Ruby-puma for Linux 3.12.4	Linux
Vulnerabilities CVE-2020-5249,CVE-2020-5247 are fixed in Ruby-puma for Linux 4.3.3	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234