CVE-2018-20164

An issue was discovered in regex.yaml (aka regexes.yaml) in UA-Parser UAP-Core before 0.6.0. A Regular Expression Denial of Service (ReDoS) issue allows remote attackers to overload a server by setting the User-Agent header in an HTTP(S) request to a value containing a long digit string. (The UAP-Core project contains the vulnerability, propagating to all implementations.)
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
mitreCNA
---
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CVEADP
---
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Base Score
CVSS 3.x
EPSS Score
Percentile: 74%
VendorProductVersion
uaparseruser_agent_parser-core
𝑥
< 0.6.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
uap-core
bullseye
1:0.12.0-1
fixed
bookworm
1:0.16.0-1
fixed
sid
1:0.18.0-1
fixed
trixie
1:0.18.0-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
uap-core
eoan
not-affected
disco
ignored
cosmic
ignored
bionic
dne
xenial
dne
trusty
dne
Common Weakness Enumeration
References
https://github.com/ua-parser/uap-core/commit/010ccdc7303546cd22b9da687c29f4a996990014
https://github.com/ua-parser/uap-core/commit/156f7e12b215bddbaf3df4514c399d683e6cdadc
https://github.com/ua-parser/uap-core/issues/332
https://www.x41-dsec.de/lab/advisories/x41-2018-009-uaparser/
https://github.com/ua-parser/uap-core/commit/010ccdc7303546cd22b9da687c29f4a996990014
https://github.com/ua-parser/uap-core/commit/156f7e12b215bddbaf3df4514c399d683e6cdadc
https://github.com/ua-parser/uap-core/issues/332
https://www.x41-dsec.de/lab/advisories/x41-2018-009-uaparser/