Bug 2014057 (CVE-2021-22959) - CVE-2021-22959 llhttp: HTTP Request Smuggling due to spaces in headers
Summary: CVE-2021-22959 llhttp: HTTP Request Smuggling due to spaces in headers
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-22959
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2014499 2014116 2014117 2014118 2014119 2014120 2014121 2014122 2014123 2014130 2014131 2014132 2014133 2014134 2027644 2027648 2027649 2031773 2086790 2086792 2086793 2086794 2087164
Blocks: 2014056
TreeView+ depends on / blocked
 
Reported: 2021-10-14 11:56 UTC by Cedric Buissart
Modified: 2022-09-13 09:54 UTC (History)
15 users (show)

Fixed In Version: llhttp 6.0.6, llhttp 2.1.4, node 12.22.7, node 14.18.1, node 16.11.1
Doc Type: If docs needed, set a value
Doc Text:
An HTTP Request Smuggling (HRS) vulnerability was found in the llhttp library, used by Node.JS. Spaces as part of the header names were accepted as valid. In situations where HTTP conversations are being proxied (such as proxy, reverse-proxy, load-balancer), an attacker can use this flaw to inject arbitrary messages through the proxy. The highest threat from this vulnerability is to confidentiality and integrity.
Clone Of:
Environment:
Last Closed: 2022-02-01 22:32:13 UTC

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:5171 0 None None None 2021-12-15 19:28:02 UTC
Red Hat Product Errata RHSA-2022:0041 0 None None None 2022-01-06 18:40:05 UTC
Red Hat Product Errata RHSA-2022:0246 0 None None None 2022-01-25 09:23:54 UTC
Red Hat Product Errata RHSA-2022:0350 0 None None None 2022-02-01 21:14:44 UTC
Red Hat Product Errata RHSA-2022:4914 0 None None None 2022-06-06 09:26:56 UTC

Description Cedric Buissart 2021-10-14 11:56:23 UTC 
The http parser accepts requests with a space (SP) right after the header name before the colon. This can lead to HTTP Request Smuggling (HRS).

The fix for this is included in llhttp v2.1.4 and v6.0.6.

Impacts:

    All versions of the 16.x, 14.x, and 12.x releases lines.
Comment 1 Cedric Buissart 2021-10-14 13:44:58 UTC 
Created nodejs tracking bugs for this issue:

Affects: epel-all [bug 2014116]
Affects: fedora-all [bug 2014117]


Created nodejs:10/nodejs tracking bugs for this issue:

Affects: fedora-all [bug 2014118]


Created nodejs:12/nodejs tracking bugs for this issue:

Affects: fedora-all [bug 2014119]


Created nodejs:13/nodejs tracking bugs for this issue:

Affects: fedora-all [bug 2014120]


Created nodejs:14/nodejs tracking bugs for this issue:

Affects: fedora-all [bug 2014121]


Created nodejs:15/nodejs tracking bugs for this issue:

Affects: fedora-all [bug 2014122]


Created nodejs:16/nodejs tracking bugs for this issue:

Affects: fedora-all [bug 2014123]
Comment 3 Cedric Buissart 2021-10-14 16:52:14 UTC 
HackerOne report (currently private) : https://hackerone.com/reports/1238099
Comment 5 Cedric Buissart 2021-10-15 11:46:26 UTC 
Upstream fixes for Node.JS :

node 12 : https://github.com/nodejs/node/commit/21a2e554e3eaa325abbdb28f366928d0ccc0a0f0
node 14 : https://github.com/nodejs/node/commit/8c254ca7e4693fb778d808fa835b095de6c9fdd4
node 16 : https://github.com/nodejs/node/commit/af488f8dc82d69847992ea1cd2f53dc8082b3b91

Upstream fixes for llhttp : 

v.6 : https://github.com/nodejs/llhttp/commit/ca84b6f903bc853c791ad14007a42f40ae34999e
v.2.1.x : https://github.com/nodejs/llhttp/commit/15ecd206262481bb87f2f9cfbf377278f5513787
Comment 12 errata-xmlrpc 2021-12-15 19:28:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:5171 https://access.redhat.com/errata/RHSA-2021:5171
Comment 13 errata-xmlrpc 2022-01-06 18:40:03 UTC 
This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 7

Via RHSA-2022:0041 https://access.redhat.com/errata/RHSA-2022:0041
Comment 14 errata-xmlrpc 2022-01-25 09:23:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Extended Update Support

Via RHSA-2022:0246 https://access.redhat.com/errata/RHSA-2022:0246
Comment 15 errata-xmlrpc 2022-02-01 21:14:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:0350 https://access.redhat.com/errata/RHSA-2022:0350
Comment 16 Product Security DevOps Team 2022-02-01 22:32:10 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-22959
Comment 17 Laurie Morse 2022-03-08 22:15:29 UTC 
Will there be a fix for NodeJS 12?
Comment 18 Vít Ondruch 2022-03-11 13:54:16 UTC 
(In reply to Laurie Morse from comment #17)
> Will there be a fix for NodeJS 12?

This CVE is rated as LOW, so there are not immediate plans to fix this. But it is quite likely we will be updating Node.js 12 around its EOL (as we did for Node.js 8 / 10), which should include the fix in the worst case.

Please contact Red Hat support should you need to help prioritize the fix.
Comment 19 errata-xmlrpc 2022-06-06 09:26:53 UTC 
This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 7

Via RHSA-2022:4914 https://access.redhat.com/errata/RHSA-2022:4914
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