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The vulnerability of the Python urllib3 HTTP client, related to uncontrolled resource consumption, allows a hacker to perform a denial-of-service attack.

🗓️ 04 Feb 2022 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec
 bdu_fstec🔗 bdu.fstec.ru👁 2 Views

Python urllib3 HTTP client vulnerability causes uncontrolled resource use and denial of service.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: Vulnerabilities in Urllib3 and react-bootstrap-table affect IBM Spectrum Discover.
22 Oct 202116:31
–ibm
IBM Security Bulletins		Security Bulletin: Vulnerability in urllib3 affects IBM Integrated Analytics System [CVE-2023-43804, CVE-2021-33503].
15 Oct 202409:46
–ibm
IBM Security Bulletins		Security Bulletin: Vulnerability in Python-urllib3 affects IBM Cloud Pak for Data System 2.0 (CPDS2.0)
11 Mar 202413:16
–ibm
IBM Security Bulletins		Security Bulletin: Multiple Vulnerabilities in CloudPak for Watson AIOPs
25 Oct 202214:32
–ibm
IBM Security Bulletins		Security Bulletin: Vulnerabilities in Redis, MinIO, Golang, and Urllib3 affect IBM Spectrum Protect Plus Container Backup and Restore for Kubernetes and OpenShift
28 Jun 202120:36
–ibm
IBM Security Bulletins		Security Bulletin: Vulnerability in Urllib3 affects IBM Spectrum Protect Plus Microsoft File Systems Backup and Restore (CVE-2021-33503)
1 Sep 202109:12
–ibm
IBM Security Bulletins		Security Bulletin: Vulnerability in urllib3 affects IBM Cloud Pak for Data System 1.0(CPDS 1.0)[CVE-2020-26137, CVE-2020-7212, CVE-2021-33503]
3 May 202507:17
–ibm
IBM Security Bulletins		Security Bulletin: IBM QRadar Advisor With Watson uses components with known vulnerabilities (CVE-2020-36242, CVE-2021-33503, CVE-2020-28493)
20 Oct 202119:08
–ibm
IBM Security Bulletins		Security Bulletin: Vulnerability in urllib3 affects IBM Cloud Pak for Data System 2.0 (CPDS 2.0)[CVE-2021-33503]
11 Mar 202413:08
–ibm
IBM Security Bulletins		Security Bulletin: Netcool Operations Insight v1.6.4 contains fixes for multiple security vulnerabilities.
14 Jun 202215:48
–ibm
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Vulners
Node
andrey_petrovurllib3Range<1.26.5
OR
ibmibm_qradar_advisorRange<2.6.2
OR
fedorafedoraMatch33
OR
fedorafedoraMatch34
SourceLink
accesswww.access.redhat.com/security/cve/cve-2021-4122
redoswww.redos.red-soft.ru/support/secure/
cybersecurity-helpwww.cybersecurity-help.cz/vdb/SB2021061305
listswww.lists.fedoraproject.org/archives/list/[email protected]/message/FMUGWEAUYGGHTPPXT6YBD53WYXQGVV73/
listswww.lists.fedoraproject.org/archives/list/[email protected]/message/6SCV7ZNAHS3E6PBFLJGENCDRDRWRZZ6W/
githubwww.github.com/urllib3/urllib3/commit/2d4a3fee6de2fa45eb82169361918f759269b4ec
ibmwww.ibm.com/support/pages/node/6507113
xn--80ahaefyxhnwww.xn--80ahaefyxhn.xn--j1afgaq.xn--p1ai/bin/view/%D0%9E%D0%A1%D0%BD%D0%BE%D0%B2%D0%B0/%D0%9E%D0%B1%D0%BD%D0%BE%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F/2.8/
wikiwww.wiki.astralinux.ru/astra-linux-se17-bulletin-2023-1023SE17
abfwww.abf.rosa.ru/advisories/ROSA-SA-2025-2772
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19 Mar 2025 00:00Current
7.1High risk
Vulners AI Score7.1
CVSS 37.5
CVSS 27.8
EPSS0.03273
Python urllib3 clientuncontrolled resource usagedenial of serviceremote attacker
2