CVE-2021-22959: XSS
First published: Tue Oct 12 2021(Updated: )
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.
Credit: support@hackerone.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/rh-nodejs14-nodejs | <0:14.18.2-1.el7 | 0:14.18.2-1.el7 |
| redhat/rh-nodejs14-nodejs-nodemon | <0:2.0.3-6.el7 | 0:2.0.3-6.el7 |
| redhat/rh-nodejs12-nodejs | <0:12.22.12-2.el7 | 0:12.22.12-2.el7 |
| Llhttp Llhttp | <2.1.4 | |
| Llhttp Llhttp | >=3.0.0<6.0.6 | |
| Oracle GraalVM | =20.3.4 | |
| Oracle GraalVM | =21.3.0 | |
| Debian Debian Linux | =11.0 | |
| debian/nodejs | 10.24.0~dfsg-1~deb10u1 10.24.0~dfsg-1~deb10u3 12.22.12~dfsg-1~deb11u4 18.13.0+dfsg1-1 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-22959 https://nvd.nist.gov/vuln/detail/CVE-2021-22959 https://nodejs.org/en/blog/vulnerability/oct-2021-security-releases/
- https://bugzilla.redhat.com/show_bug.cgi?id=2014057
- https://access.redhat.com/errata/RHEA-2022:5139
- https://access.redhat.com/errata/RHSA-2021:5171
- https://access.redhat.com/errata/RHSA-2022:0350
- https://access.redhat.com/errata/RHEA-2022:4925
- https://access.redhat.com/errata/RHEA-2022:5221
- https://access.redhat.com/errata/RHEA-2022:5615
- https://access.redhat.com/errata/RHSA-2022:0246
- https://access.redhat.com/errata/RHSA-2022:0041
- https://access.redhat.com/errata/RHSA-2022:4914
- https://access.redhat.com/security/cve/cve-2021-22959
- https://hackerone.com/reports/1238709
- https://www.debian.org/security/2022/dsa-5170
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://hackerone.com/reports/1238099
- https://github.com/nodejs/node/commit/21a2e554e3eaa325abbdb28f366928d0ccc0a0f0
- https://nodejs.org/en/blog/vulnerability/oct-2021-security-releases/#http-request-smuggling-due-to-spaced-in-headers-medium-cve-2021-22959
- https://security-tracker.debian.org/tracker/CVE-2021-22959
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2014116
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2014117
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2014118
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2014119
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2014120
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2014121
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2014122
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2014123
- https://github.com/nodejs/node/commit/8c254ca7e4693fb778d808fa835b095de6c9fdd4
- https://github.com/nodejs/node/commit/af488f8dc82d69847992ea1cd2f53dc8082b3b91
- https://github.com/nodejs/llhttp/commit/ca84b6f903bc853c791ad14007a42f40ae34999e
- https://github.com/nodejs/llhttp/commit/15ecd206262481bb87f2f9cfbf377278f5513787
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2014057#c17
- https://exchange.xforce.ibmcloud.com/vulnerabilities/211168
- https://www.ibm.com/support/pages/node/6517470 (Advisory)
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2021-22959?
CVE-2021-22959 is an HTTP Request Smuggling vulnerability found in the llhttp library, used by Node.JS.
How does CVE-2021-22959 impact HTTP conversations?
CVE-2021-22959 allows an attacker to inject malicious content into HTTP conversations that are being proxied, such as proxy, reverse-proxy, or load-balancer.
Which versions of Node.JS are affected by CVE-2021-22959?
The affected versions of Node.JS include rh-nodejs14-nodejs, rh-nodejs14-nodejs-nodemon, rh-nodejs12-nodejs, node (v12.22.7), and node (v14.18.1).
What is the severity of CVE-2021-22959?
The severity of CVE-2021-22959 is medium, with a CVSS score of 6.1.
How can I fix CVE-2021-22959?
To fix CVE-2021-22959, update the affected software packages to the specified versions provided by Red Hat.
- collector/redhat-cve
- collector/nvd-index
- collector/security-tracker-debian
- agent/type
- agent/last-modified-date
- agent/first-publish-date
- agent/softwarecombine
- agent/remedy
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- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-22959
- agent/software-canonical-lookup
- agent/tags
- agent/event
- collector/ibm-support
- source/IBM
- package-manager/redhat
- vendor/llhttp
- canonical/llhttp llhttp
- version/llhttp llhttp/3.0.0
- vendor/oracle
- canonical/oracle graalvm
- version/oracle graalvm/20.3.4
- version/oracle graalvm/21.3.0
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/11.0
- package-manager/debian