CVE-2021-22883
Node.js before 10.24.0, 12.21.0, 14.16.0, and 15.10.0 is vulnerable to a denial of service attack when too many connection attempts with an 'unknownProtocol' are established. This leads to a leak of
02 Description
Node.js before 10.24.0, 12.21.0, 14.16.0, and 15.10.0 is vulnerable to a denial of service attack when too many connection attempts with an 'unknownProtocol' are established. This leads to a leak of
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 77.38% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 99.5% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2021-03-03 17:38Z5 YR AGO
- Last updated
- 2025-04-30 22:24Z1 YR AGO
- Reserved
- 2021-01-06
- Assigning CNA
- hackerone
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- cbfe725acd29d0eb6ca1cbb93904deafc090179826f7c8805bca97c05bf7ce12
05 Affected products
06 References
- nodejs.orghttps://nodejs.org/en/blog/vulnerability/february-2021-security-releases/
- hackerone.comhttps://hackerone.com/reports/1043360
- lists.fedoraproject.orgFEDORA-2021-a760169c3chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E4FRS5ZVK4ZQ7XIJQNGIKUXG2DJFHLO7/
- lists.fedoraproject.orgFEDORA-2021-f6bd75e9d4https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F45Y7TXSU33MTKB6AGL2Q5V5ZOCNPKOG/
- lists.fedoraproject.orgFEDORA-2021-6aaba80ba2https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HSYFUGKFUSZ27M5TEZ3FKILWTWFJTFAZ/
- www.oracle.comhttps://www.oracle.com/security-alerts/cpuApr2021.html
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20210416-0001/
- www.oracle.comhttps://www.oracle.com//security-alerts/cpujul2021.html
- www.oracle.comhttps://www.oracle.com/security-alerts/cpuoct2021.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
07 Fixed in
AlmaLinux 8
- nodejs Fixed
A version is affected if any line below covers it.
- Affected before 1:10.24.0-1.module_el8.3.0+2047+b07ac28e
- Affected before 1:10.24.0-1.module_el8.4.0+2224+b07ac28e
- Affected before 1:10.24.0-1.module_el8.5.0+81+7dbe79d3
- nodejs-devel Fixed
A version is affected if any line below covers it.
- Affected before 1:10.24.0-1.module_el8.3.0+2047+b07ac28e
- Affected before 1:10.24.0-1.module_el8.4.0+2224+b07ac28e
- Affected before 1:10.24.0-1.module_el8.5.0+81+7dbe79d3
- nodejs-docs Fixed in 1:10.24.0-1.module_el8.3.0+2047+b07ac28e
- nodejs-full-i18n Fixed
A version is affected if any line below covers it.
- Affected before 1:10.24.0-1.module_el8.3.0+2047+b07ac28e
- Affected before 1:10.24.0-1.module_el8.4.0+2224+b07ac28e
- Affected before 1:10.24.0-1.module_el8.5.0+81+7dbe79d3
- nodejs-nodemon Fixed
A version is affected if any line below covers it.
- Affected before 1.18.3-1.module_el8.3.0+2023+d2377ea3
- Affected before 1.18.3-1.module_el8.3.0+2047+b07ac28e
- Affected before 2.0.3-1.module_el8.4.0+2521+c668cc9f
- nodejs-packaging Fixed
A version is affected if any line below covers it.
- Affected before 17-3.module_el8.3.0+2023+d2377ea3
- Affected before 17-3.module_el8.4.0+2224+b07ac28e
- Affected before 17-3.module_el8.4.0+2521+c668cc9f
- Affected before 23-3.module_el8.4.0+2522+3bd42762
- Affected before 23-3.module_el8.5.0+254+b4526b16
- npm Fixed
A version is affected if any line below covers it.
- Affected before 1:6.14.11-1.10.24.0.1.module_el8.3.0+2047+b07ac28e
- Affected before 1:6.14.11-1.10.24.0.1.module_el8.4.0+2224+b07ac28e
- Affected before 1:6.14.11-1.10.24.0.1.module_el8.5.0+81+7dbe79d3
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Arch Linux
- nodejs Fixed in 15.10.0-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
CloudLinux 8
- nodejs Fixed
A version is affected if any line below covers it.
- Affected before 1:10.24.0-1.module_el8.3.0+2047+b07ac28e
- Affected before 1:10.24.0-1.module_el8.4.0+2224+b07ac28e
- Affected before 1:10.24.0-1.module_el8.5.0+81+7dbe79d3
- nodejs-devel Fixed
A version is affected if any line below covers it.
- Affected before 1:10.24.0-1.module_el8.3.0+2047+b07ac28e
- Affected before 1:10.24.0-1.module_el8.4.0+2224+b07ac28e
- Affected before 1:10.24.0-1.module_el8.5.0+81+7dbe79d3
- nodejs-docs Fixed in 1:10.24.0-1.module_el8.3.0+2047+b07ac28e
- nodejs-full-i18n Fixed
A version is affected if any line below covers it.
- Affected before 1:10.24.0-1.module_el8.3.0+2047+b07ac28e
- Affected before 1:10.24.0-1.module_el8.4.0+2224+b07ac28e
- Affected before 1:10.24.0-1.module_el8.5.0+81+7dbe79d3
- nodejs-nodemon Fixed
A version is affected if any line below covers it.
- Affected before 1.18.3-1.module_el8.3.0+2023+d2377ea3
- Affected before 1.18.3-1.module_el8.3.0+2047+b07ac28e
- Affected before 2.0.3-1.module_el8.4.0+2521+c668cc9f
- nodejs-packaging Fixed
A version is affected if any line below covers it.
- Affected before 17-3.module_el8.3.0+2023+d2377ea3
- Affected before 17-3.module_el8.4.0+2224+b07ac28e
- Affected before 17-3.module_el8.4.0+2521+c668cc9f
- Affected before 23-3.module_el8.4.0+2522+3bd42762
- Affected before 23-3.module_el8.5.0+254+b4526b16
- npm Fixed
A version is affected if any line below covers it.
- Affected before 1:6.14.11-1.10.24.0.1.module_el8.3.0+2047+b07ac28e
- Affected before 1:6.14.11-1.10.24.0.1.module_el8.4.0+2224+b07ac28e
- Affected before 1:6.14.11-1.10.24.0.1.module_el8.5.0+81+7dbe79d3
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- nodejs Fixed in 12.21.0~dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- nodejs Fixed in 12.21.0~dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- nodejs Fixed in 12.21.0~dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- nodejs Fixed in 10.19.0~dfsg-3ubuntu1.2
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- nodejs No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.