CVE-2020-5243

Denial of Service in uap-core when processing crafted User-Agent strings

HIGH
7.5
CVSS Score
Published: February 20, 2020 at 11:15 PM UTC
Updated: June 17, 2026 at 03:21 AM UTC
2 products affected across 2 vendorsUap CoreCore Project Uap Core

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Severity
HIGH7.5
Exploit prediction
EPSS 2%

Description

uap-core before 0.7.3 is vulnerable to a denial of service attack when processing crafted User-Agent strings. 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. This has been patched in uap-core 0.7.3.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.7.3
Affected range stops below 0.7.3, so it looks safe — our inference, not a vendor statement
v < 0.7.3
Affected range stops below 0.7.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20CWE-1333

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