Bug 2007571 (CVE-2021-32714)

Summary:	CVE-2021-32714 rust-hyper: integer overflow in chunked Transfer-Encoding
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	igor.raits, rust-sig
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2021-09-24 12:21:06 UTC	Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2007573
Bug Blocks:

Description Dhananjay Arunesh 2021-09-24 09:53:37 UTC

hyper is an HTTP library for Rust. In versions prior to 0.14.10, hyper's HTTP
server and client code had a flaw that could trigger an integer overflow when
decoding chunk sizes that are too big. This allows possible data loss, or if
combined with an upstream HTTP proxy that allows chunk sizes larger than hyper
does, can result in "request smuggling" or "desync attacks." The vulnerability
is patched in version 0.14.10. Two possible workarounds exist. One may reject
requests manually that contain a `Transfer-Encoding` header or ensure any
upstream proxy rejects `Transfer-Encoding` chunk sizes greater than what fits in
64-bit unsigned integers.

References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32714
https://github.com/hyperium/hyper/security/advisories/GHSA-5h46-h7hh-c6x9

Comment 1 Dhananjay Arunesh 2021-09-24 09:55:45 UTC

Created rust-hyper tracking bugs for this issue:

Affects: fedora-34 [bug 2007573]

Comment 2 Product Security DevOps Team 2021-09-24 12:21:06 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.