p PatchFirst

CVE-2023-46136

CVE-2023-46136 · Werkzeug vulnerable to high resource usage when parsing multipart/form-data containing a large part with CR/LF character at the beginning

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Werkzeug is a comprehensive WSGI web application library. In versions on the 3.x branch prior to 3.0.1 and on the 2.x branch prior to 2.3.8, if an upload of a file that starts with CR or LF and then is followed by megabytes of data without these characters: all of these bytes are appended chunk by chunk into internal bytearray and lookup for boundary is performed on growing buffer. This allows an attacker to cause a denial of service by sending crafted multipart data to an endpoint that will parse it. The amount of CPU time required can block worker processes from handling legitimate requests. This vulnerability has been patched in version 3.0.1 and 2.3.8.

CVSS 8.0 · High · EPSS 1.3% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • werkzeug

    Versions
    • >= 3.0.0, < 3.0.1: Affected
    • >= 2.0.0rc1, < 2.3.8: Affected

    No fix published

  • python-werkzeug Debian:12

    Versions
    • 2.2.2-3
    Affected ranges
    • ECOSYSTEM: < 2.2.2-3+deb12u1

    Update to 2.2.2-3+deb12u1

  • python-werkzeug Debian:13

    Affected ranges
    • ECOSYSTEM: < 3.0.1-2

    Update to 3.0.1-2

  • python-werkzeug Debian:14

    Affected ranges
    • ECOSYSTEM: < 3.0.1-2

    Update to 3.0.1-2

  • werkzeug PyPI

    Versions
    • 3.0.0
    Affected ranges
    • ECOSYSTEM: ≥ 3.0.0, < 3.0.1

    Update to 3.0.1

  • werkzeug PyPI

    Versions
    • 2.0.0
    • 2.0.0rc1
    • 2.0.0rc2
    • 2.0.0rc3
    • 2.0.0rc4
    • 2.0.0rc5
    • 2.0.1
    • 2.0.2
    • 2.0.3
    • 2.1.0
    • 2.1.1
    • 2.1.2
    • 2.2.0
    • 2.2.0a1
    • 2.2.1
    • 2.2.2
    • 2.2.3
    • 2.3.0
    • 2.3.1
    • 2.3.2
    • 2.3.3
    • 2.3.4
    • 2.3.5
    • 2.3.6
    • 2.3.7
    Affected ranges
    • ECOSYSTEM: ≥ 2.0.0rc1, < 2.3.8

    Update to 2.3.8

  • werkzeug PyPI

    Versions
    • 0.1
    • 0.10
    • 0.10.1
    • 0.10.2
    • 0.10.3
    • 0.10.4
    • 0.11
    • 0.11.1
    • 0.11.10
    • 0.11.11
    • 0.11.12
    • 0.11.13
    • 0.11.14
    • 0.11.15
    • 0.11.2
    • 0.11.3
    • 0.11.4
    • 0.11.5
    • 0.11.6
    • 0.11.7
    • 0.11.8
    • 0.11.9
    • 0.12
    • 0.12.1
    • 0.12.2
    • 0.13
    • 0.14
    • 0.14.1
    • 0.15.0
    • 0.15.1
    • 0.15.2
    • 0.15.3
    • 0.15.4
    • 0.15.5
    • 0.15.6
    • 0.16.0
    • 0.16.1
    • 0.2
    • 0.3
    • 0.3.1
    • 0.4
    • 0.4.1
    • 0.5
    • 0.5.1
    • 0.6
    • 0.6.1
    • 0.6.2
    • 0.7
    • 0.7.1
    • 0.7.2
    • 0.8
    • 0.8.1
    • 0.8.2
    • 0.8.3
    • 0.9
    • 0.9.1
    • 0.9.2
    • 0.9.3
    • 0.9.4
    • 0.9.5
    • 0.9.6
    • 1.0.0
    • 1.0.0rc1
    • 1.0.1
    • 2.0.0
    • 2.0.0rc1
    • 2.0.0rc2
    • 2.0.0rc3
    • 2.0.0rc4
    • 2.0.0rc5
    • 2.0.1
    • 2.0.2
    • 2.0.3
    • 2.1.0
    • 2.1.1
    • 2.1.2
    • 2.2.0
    • 2.2.0a1
    • 2.2.1
    • 2.2.2
    • 2.2.3
    • 2.3.0
    • 2.3.1
    • 2.3.2
    • 2.3.3
    • 2.3.4
    • 2.3.5
    • 2.3.6
    • 2.3.7
    • 3.0.0
    Affected ranges
    • {"events": [{"introduced": "0"}, {"fixed": "f3c803b3ade485a45f12b6d6617595350c0f03e2"}, {"fixed": "f2300208d5e2a5076cbbb4c2aad71096fd040ef9"}], "repo": "https://github.com/pallets/werkzeug", "type": "GIT"}
    • ECOSYSTEM: < 2.3.8 ∪ ≥ 3.0.0, < 3.0.1

    Update to 2.3.8; Update to 3.0.1

Original sources

Check your server →