CVE-2020-5249

2020-03-0200:00:00

ubuntu.com

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:N/I:P/A:N

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

0.01 Low

EPSS

Percentile

83.3%

JSON

In Puma (RubyGem) before 4.3.3 and 3.12.4, if an application using Puma
allows untrusted input in an early-hints header, an attacker can use a
carriage return character 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-2020-5247, which fixed
this vulnerability but only for regular responses. This has been fixed in
4.3.3 and 3.12.4.