CVE-2020-28473
python-bottle - security update
6.8
MEDIUM
CVSS 3.1
EPSS 0.24%
Description
The package bottle from 0 and before 0.12.19 are vulnerable to Web Cache Poisoning by using a vector called parameter cloaking. When the attacker can separate query parameters using a semicolon (;), they can cause a difference in the interpretation of the request between the proxy (running with default configuration) and the server. This can result in malicious requests being cached as completely safe ones, as the proxy would usually not see the semicolon as a separator, and therefore would not include it in a cache key of an unkeyed parameter.
How to fix CVE-2020-28473
To remediate CVE-2020-28473, upgrade the affected package to a fixed version below.
- —upgrade to 0.12.19-1 or later
- —upgrade to 0.12.13-1+deb9u1 or later
- —upgrade to 0.12.19 or later
- —upgrade to 0.12.19 or later
Is CVE-2020-28473 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 0.12.19-1
- from 0, < 0.12.13-1+deb9u1
- from 0, < 0.12.19
- from 0, < 0.12.19
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM6.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H |