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debiancveDebian Security Bug TrackerDEBIANCVE:CVE-2021-33503
HistoryJun 29, 2021 - 11:15 a.m.

CVE-2021-33503

2021-06-2911:15:07
Debian Security Bug Tracker
security-tracker.debian.org
30
urllib3
denial of service
authority component

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.003

Percentile

69.2%

JSON

An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

Related

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cbl_mariner 2
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photon 6
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redos 1
ibm 22
osv 10
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fedora 3
github 1
nvd 1
redhat 5
ubuntucve 1
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almalinux 2
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rocky 2
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redhatcve
redhatcve
CVE-2021-33503
2021-06-06 01:54:37
cbl_mariner
cbl_mariner
CVE-2021-33503 affecting package python-urllib3 1.25.9-2
2021-08-11 06:39:25
CVE-2021-33503 affecting package python-urllib3 for versions less than 1.25.9-3
2022-04-09 06:51:50
prion
prion
Open redirect
2021-06-29 11:15:00
openvas
openvas
SUSE: Security Advisory (SUSE-SU-2021:2012-1)
2021-06-20 00:00:00
Ubuntu: Security Advisory (USN-5812-1)
2023-01-20 00:00:00
Fedora: Security Advisory for python-urllib3 (FEDORA-2021-a6bde7ab18)
2021-07-06 00:00:00
photon
photon
Important Photon OS Security Update - PHSA-2021-0266
2021-07-12 00:00:00
Important Photon OS Security Update - PHSA-2021-3.0-0266
2021-07-13 00:00:00
Critical Photon OS Security Update - PHSA-2021-0060
2021-07-13 00:00:00
nessus
nessus
SUSE SLED15 / SLES15 Security Update : python-urllib3 (SUSE-SU-2021:2012-1)
2021-06-21 00:00:00
Photon OS 3.0: Python PHSA-2021-3.0-0266
2021-07-22 00:00:00
Photon OS 4.0: Python3 PHSA-2021-4.0-0060
2021-07-22 00:00:00
redos
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ROS-20220125-01
2022-01-25 00:00:00
ibm
ibm
Security Bulletin: Vulnerability in urllib3 affects IBM Cloud Pak for Data System 2.0 (CPDS 2.0)[CVE-2021-33503]
2024-03-11 13:08:06
Security Bulletin: Watson CP4D Data Stores is vulnerable to urllib3 denial of service vulnerability ( CVE-2021-33503)
2023-07-05 21:05:31
Security Bulletin: Vulnerability in Urllib3 affects IBM Spectrum Protect Plus Microsoft File Systems Backup and Restore (CVE-2021-33503)
2021-09-01 09:12:49
osv
osv
Catastrophic backtracking in URL authority parser when passed URL containing many @ characters
2021-06-01 21:19:32
PYSEC-2021-108
2021-06-29 11:15:00
CVE-2021-33503
2021-06-29 11:15:07
archlinux
archlinux
[ASA-202106-25] python-urllib3: denial of service
2021-06-09 00:00:00
amazon
amazon
Medium: python-urllib3
2021-07-14 20:40:00
cvelist
cvelist
CVE-2021-33503
2021-06-29 10:55:35
ubuntu
ubuntu
urllib3 vulnerability
2023-01-19 00:00:00
veracode
veracode
Denial Of Service (DoS)
2021-06-02 08:30:01
f5
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K23456112 : Python urllib3 vulnerability CVE-2021-33503
2021-11-26 00:00:00
cve
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CVE-2021-33503
2021-06-29 11:15:07
fedora
fedora
[SECURITY] Fedora 34 Update: python-urllib3-1.25.10-5.fc34
2021-07-04 01:10:06
[SECURITY] Fedora 33 Update: python-urllib3-1.25.8-5.fc33
2021-07-08 01:08:49
[SECURITY] Fedora 34 Update: mingw-python-urllib3-1.25.10-3.fc34
2021-06-19 01:09:27
github
github
Catastrophic backtracking in URL authority parser when passed URL containing many @ characters
2021-06-01 21:19:32
nvd
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CVE-2021-33503
2021-06-29 11:15:07
redhat
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(RHSA-2021:3473) Moderate: Red Hat Automation Platform 1.2.5 security and bugfixes update
2021-09-08 19:16:20
(RHSA-2021:4160) Moderate: python39:3.9 and python39-devel:3.9 security update
2021-11-09 08:26:25
(RHSA-2021:4162) Moderate: python38:3.8 and python38-devel:3.8 security update
2021-11-09 12:47:54
ubuntucve
ubuntucve
CVE-2021-33503
2021-06-29 00:00:00
suse
suse
Security update for python-urllib3 (important)
2021-07-10 00:00:00
mageia
mageia
Updated python-urllib3 package fixes security vulnerabilities
2021-07-27 23:21:53
Updated python-pip packages fix security vulnerabilities
2021-07-25 17:45:06
gentoo
gentoo
urllib3: Multiple vulnerabilities
2021-07-15 00:00:00
almalinux
almalinux
Moderate: python39:3.9 and python39-devel:3.9 security update
2021-11-09 08:26:25
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oraclelinux
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2021-11-16 00:00:00
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rocky
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oracle
oracle
Oracle Critical Patch Update Advisory - October 2021
2021-10-19 00:00:00

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.003

Percentile

69.2%

JSON
Related for DEBIANCVE:CVE-2021-33503
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