CVE-2020-11076 — HTTP Smuggling via Transfer-Encoding Header in Puma

Affected: puma

In Puma (RubyGem) before 4.3.4 and 3.12.5, an attacker could smuggle an HTTP response, by using an invalid transfer-encoding header. The problem has been fixed in Puma 3.12.5 and Puma 4.3.4.

USN-6682-1 — puma vulnerabilities

Affected: Ubuntu:Pro:20.04:LTS: puma, Ubuntu:Pro:22.04:LTS: puma

ZeddYu Lu discovered that Puma incorrectly handled parsing certain headers. A remote attacker could possibly use this issue to perform an HTTP Request Smuggling attack. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-11076)

It was discovered that Puma incorrectly handled parsing certain headers. A remote attacker could possibly use this issue to perform an HTTP Request Smuggling attack. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-11077)

Jean Boussier discovered that Puma might not always release resources properly after handling HTTP requests. A remote attacker could possibly use this issue to read sensitive information. (CVE-2022-23634)

It was discovered that Puma incorrectly handled certain malformed headers. A remote attacker could use this issue to perform an HTTP Request Smuggling attack. (CVE-2022-24790)

Ben Kallus discovered that Puma incorrectly handled parsing certain headers. A remote attacker could use this issue to perform an HTTP Request Smuggling attack. (CVE-2023-40175)

Bartek Nowotarski discovered that Puma incorrectly handled parsing certain encoded content. A remote attacker could possibly use this to cause a denial of service. (CVE-2024-21647)

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CVE-2020-11076 — HTTP Smuggling via Transfer-Encoding Header in Puma

USN-6682-1 — puma vulnerabilities