Debian Security Advisory

DLA-2531-1 python-bottle -- LTS security update

Date Reported:
25 Jan 2021
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2020-28473.
More information:

The package src:python-bottle 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.

For Debian 9 stretch, this problem has been fixed in version 0.12.13-1+deb9u1.

We recommend that you upgrade your python-bottle packages.

For the detailed security status of python-bottle please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: