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CVE-2020-11076

Good to know:

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Date: May 22, 2020

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.

Language: Ruby

Severity Score

Related Resources (13)

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00034.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SKIY5H67GJIGJL6SMFWFLUQQQR3EMVPR
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKIY5H67GJIGJL6SMFWFLUQQQR3EMVPR/
https://github.com/puma/puma
https://github.com/puma/puma/commit/f24d5521295a2152c286abb0a45a1e1e2bd275bd
https://lists.debian.org/debian-lts-announce/2020/10/msg00009.html
https://github.com/puma/puma/security/advisories/GHSA-x7jg-6pwg-fx5h
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00038.html
https://github.com/puma/puma/blob/master/History.md#434435-and-31253126--2020-05-22
https://security-tracker.debian.org/tracker/CVE-2020-11076
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2020-11076.yml
https://nvd.nist.gov/vuln/detail/CVE-2020-11076
https://www.mend.io/vulnerability-database/CVE-2020-11076

Severity Score

Weakness Type (CWE)

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CWE-444

Top Fix

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Upgrade Version

Upgrade to version puma - 4.3.4;puma - 3.12.5

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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