PT-2020-3715 · Ruby+2 · Puma+2
Nateberkopec
·
Published
2016-10-03
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Updated
2025-09-29
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CVE-2020-5247
CVSS v3.1
7.5
High
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Name of the Vulnerable Software and Affected Versions:
Puma versions prior to 4.3.2
Puma versions prior to 3.12.3
Description:
The issue is related to HTTP Response Splitting, where an attacker can use newline characters (
CR, LF, or /r, /n) to end a header and inject malicious content, such as additional headers or a new response body. This can be a vector for other attacks, including cross-site scripting (XSS).Recommendations:
For versions prior to 4.3.2, update to version 4.3.2 or later.
For versions prior to 3.12.3, update to version 3.12.3 or later.
As a temporary workaround, consider restricting untrusted input in response headers to minimize the risk of exploitation.
Exploit
Fix
Special Elements Injection
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Related Identifiers
Affected Products
Alt Linux
Puma
Suse