CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
27.9%
Werkzeug is a comprehensive WSGI web application library. 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.
github.com/pallets/werkzeug/commit/f3c803b3ade485a45f12b6d6617595350c0f03e2
github.com/pallets/werkzeug/security/advisories/GHSA-hrfv-mqp8-q5rw
launchpad.net/bugs/cve/CVE-2023-46136
nvd.nist.gov/vuln/detail/CVE-2023-46136
security-tracker.debian.org/tracker/CVE-2023-46136
www.cve.org/CVERecord?id=CVE-2023-46136