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veracodeVeracode Vulnerability DatabaseVERACODE:45361
HistoryFeb 06, 2024 - 7:27 a.m.

Regular Expression Denial Of Service (ReDoS)

2024-02-0607:27:53
Veracode Vulnerability Database
sca.analysiscenter.veracode.com
9
fastapi
vulnerability
regular expression
denial of service
python-multipart
complexity
attacker
content-type
header
application
hang
crafted

7.5 High

CVSS3

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

6.7 Medium

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

NETWORK

Access 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

0.001 Low

EPSS

Percentile

46.6%

JSON

fastapi is vulnerable to Regular Expression Denial Of Service (ReDoS). The vulnerability is due to the python-multipart dependency which utilized a Regex expression with inefficient complexity. An attacker can inject a malicious Content-Type header, which causes the application to hang while it processes the crafted header.

CPENameOperatorVersion
fastapile0.109.0
fastapile0.109.0

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7.5 High

CVSS3

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

6.7 Medium

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

NETWORK

Access 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

0.001 Low

EPSS

Percentile

46.6%

JSON
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