Bug 1842539 (CVE-2020-11076) - CVE-2020-11076 rubygem-puma: HTTP Smuggling via an invalid Transfer-Encoding Header
Summary: CVE-2020-11076 rubygem-puma: HTTP Smuggling via an invalid Transfer-Encoding ...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2020-11076
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1842540 1842948 1843847
Blocks: 1842541
TreeView+ depends on / blocked
 
Reported: 2020-06-01 13:43 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-10-28 08:16 UTC (History)
13 users (show)

Fixed In Version: rubygem-puma 4.3.4, rubygem-puma 3.12.5
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in rubygem-puma. An attacker could smuggle an HTTP response, by using an invalid transfer-encoding header.
Clone Of:
Environment:
Last Closed: 2021-10-28 08:16:23 UTC
Embargoed:

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Description Guilherme de Almeida Suckevicz 2020-06-01 13:43:09 UTC 
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.

References:
https://github.com/puma/puma/security/advisories/GHSA-x7jg-6pwg-fx5h
https://github.com/puma/puma/blob/master/History.md#434435-and-31253126--2020-05-22

Upstream commit:
https://github.com/puma/puma/commit/f24d5521295a2152c286abb0a45a1e1e2bd275bd
Comment 1 Guilherme de Almeida Suckevicz 2020-06-01 13:43:26 UTC 
Created rubygem-puma tracking bugs for this issue:

Affects: fedora-all [bug 1842540]
Comment 3 Przemyslaw Roguski 2020-06-02 12:41:23 UTC 
External References:

https://github.com/puma/puma/security/advisories/GHSA-x7jg-6pwg-fx5h
Comment 4 Przemyslaw Roguski 2020-06-02 12:41:26 UTC 
Mitigation:

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Comment 6 Przemyslaw Roguski 2020-06-03 08:05:24 UTC 
Statement:

Red Hat Gluster Storage 3 Web Administration component uses affected RubyGem Puma, which does not have the http body chunk verification.
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