VDB
CVE-2020-5243
CVE-2020-5243
PUBLISHED
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.
EPSS 0.81% · 74.5th percentile
Risk Scores
EPSS Score
0.81%
74.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:24.04:LTS | uap-core | 0, 1:0.18.0-1 |
| Ubuntu:25.10 | uap-core | 0, * |
| Ubuntu:22.04:LTS | uap-core | *, *, 0 |
| Ubuntu:20.04:LTS | uap-core | 0, 20190213-2 |
Exploit Intelligence
Timeline
- Feb 20, 2020 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 1, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
- Nov 6, 2022 EPSS Score
- Jan 8, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2020-5243 third-party-advisory
- https://github.com/ua-parser/uap-core/commit/0afd61ed85396a3b5316f18bfd1edfaadf8e88e1 third-party-advisory
- https://github.com/ua-parser/uap-core/security/advisories/GHSA-cmcx-xhr8-3w9p third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2020-5243 third-party-advisory