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Public proof of conceptFix available

CVE-2023-24329

A public proof of concept exists; no exploitation attested.

  • Published2023-02-17
  • Fixed in3.11.4 · 3.10.12 · 3.9.17 · 3.8.17 · 3.7.17
  • WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An issue in the urllib.parse component of Python before 3.11.4 allows attackers to bypass blocklisting methods by supplying a URL that starts with blank characters.

Timeline

dates in UTC
  1. 2023-02-1715:15CVE publishedNVD

Versions per branch

NVD · OSV
Python
BranchAffectedFixed in
3.11≥ 3.11.0, < 3.11.43.11.4
3.10≥ 3.10.0, < 3.10.123.10.12
3.9≥ 3.9.0, < 3.9.173.9.17
3.8≥ 3.8.0, < 3.8.173.8.17
3.7< 3.7.173.7.17
Fedoraproject fedora
BranchAffectedFixed in
36.x= 36no fix published
37.x= 37no fix published
38.x= 38no fix published
Netapp active iq unified manager
BranchAffectedFixed in
—all versionsno fix published

3 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • babelRocky Linux:8all versions · fixed in 0:2.5.1-10.module+el8.5.0+706+735ec4b3
  • babelRocky Linux:8all versions · fixed in 0:2.7.0-11.module+el8.5.0+672+ab6eb015
  • babelRed Hat:enterprise_linux:8::appstreamall versions · fixed in 0:2.5.1-10.module+el8.5.0+11014+88fc0d0band 1 other package
  • babelRed Hat:enterprise_linux:8::appstreamall versions · fixed in 0:2.7.0-11.module+el8.5.0+11015+9c1c7c42
  • babelAlmaLinux:8all versions · fixed in 2.5.1-10.module_el8.6.0+2781+fed64c13and 1 other package
  • CythonRocky Linux:8all versions · fixed in 0:0.28.1-7.module+el8.5.0+706+735ec4b3
  • CythonRocky Linux:8all versions · fixed in 0:0.29.14-4.module+el8.4.0+570+c2eaf144
  • CythonRocky Linux:8all versions · fixed in 0:0.29.21-5.module+el8.4.0+574+843c4898

490 more package ranges on OSV.dev

Vendor advisories

  • CVE-2023-24329 Red Hat Product Security4,469 products fixed · 16 known affected

    python: urllib.parse url blocklisting bypass

    python2-debug (gimp:flatpak) as a component of Red Hat Enterprise Linux 8 · python2-debug (inkscape:flatpak) as a component of Red Hat Enterprise Linux 8 · python2-devel (gimp:flatpak) as a component of Red Hat Enterprise Linux 8 · +13 more

  • ICSA-25-105-08 CISA2 known affected

    ABB M2M Gateway

    ABB M2M Gateway ARM600, firmware versions = 4.1.2 <= 5.0.3 · ABB M2M Gateway SW, software versions = 5.0.1 <= 5.0.3

  • ICSA-23-348-10 CISA5 known affected

    Siemens SIMATIC S7-1500

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) · SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) · +2 more

  • SSA-398330 Siemens ProductCERT5 known affected

    SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= V3.1.0 < V3.1.5 · SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= V3.1.0 < V3.1.5 · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= V3.1.0 < V3.1.5 · +2 more

  • RHSA-2023:6793 Red Hat Product Security38 products fixed

    Red Hat Security Advisory: rh-python38-python security update

  • RHSA-2023:4282 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: Red Hat Virtualization Host 4.4.z SP 1 security update

24 more advisories

Full record on NVD

Fix

  1. Update Python to 3.11.4 · 3.10.12 · 3.9.17 · 3.8.17 · 3.7.17
  2. Vendor fix Siemens ProductCERT SSA-398330 · 1 productUpdate to V3.1.5 or later version
  3. Vendor fix CISA ICSA-23-348-10 · 5 productsUpdate to V3.1.5 or later version
  4. Vendor fix Red Hat Product Security RHSA-2023:6793 · 38 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  5. Vendor fix Red Hat Product Security RHSA-2023:4282 · 2 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/2974891
  6. Mitigation from the vendor CISA ICSA-25-105-08 · 2 productsMitigating factors describe conditions and circumstances that make an attack that exploits the vulnerability difficult or less likely to succeed. The following mitigations are recommended. 1. Obtain a cellular private access point (APN). A dedicated private cellular access point and respective SIM…
  7. Mitigation from the vendor CISA ICSA-23-348-10 · 5 productsOnly build and run applications from trusted sources.

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published
2023-02-17
Last Modified
2026-10-14
NVD status
Modified
GitHub Advisory
GHSA-r32r-rqw2-wv5m

Frequently asked questions

What is CVE-2023-24329?

An issue in the urllib.parse component of Python before 3.11.4 allows attackers to bypass blocklisting methods by supplying a URL that starts with blank characters.

Is CVE-2023-24329 actively exploited?

Active exploitation of CVE-2023-24329 has not been confirmed. Its EPSS score was 20.5% on 2026-11-05, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-24329?

CVE-2023-24329 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

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