Skip to content

Denial of Service in uap-core

High severity GitHub Reviewed Published Jan 30, 2021 in ua-parser/uap-core • Updated Feb 8, 2024

Package

npm uap-core (npm)

Affected versions

< 0.11.0

Patched versions

0.11.0

Description

Impact

Some regexes are vulnerable to regular expression denial of service (REDoS) due to overlapping capture groups. This allows remote attackers to overload a server by setting the User-Agent header in an HTTP(S) request to maliciously crafted long strings.

Patches

Please update uap-core to >= v0.11.0

Downstream packages such as uap-python, uap-ruby etc which depend upon uap-core follow different version schemes.

References

@commenthol commenthol published to ua-parser/uap-core Jan 30, 2021
Reviewed Feb 1, 2021
Published to the GitHub Advisory Database Feb 2, 2021
Published by the National Vulnerability Database Feb 16, 2021
Last updated Feb 8, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.450%
(75th percentile)

Weaknesses

CVE ID

CVE-2021-21317

GHSA ID

GHSA-p4pj-mg4r-x6v4

Source code

Loading Checking history
See something to contribute? Suggest improvements for this vulnerability.