CVE-2020-5243
Denial of Service in uap-core when processing crafted User-Agent strings
5.7
MEDIUM
CVSS 3.1
EPSS 0.80%
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.
How to fix CVE-2020-5243
To remediate CVE-2020-5243, upgrade the affected package to a fixed version below.
- —upgrade to 1:0.8.0-1 or later
- —upgrade to 0.7.3 or later
- —upgrade to 2.6.0 or later
Is CVE-2020-5243 being exploited?
Low — EPSS is 0.8%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 1:0.8.0-1
- from 0, < 0.7.3
- from 0, < 2.6.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H |