CVE-2020-28473

medium

Published 2021-04-07 · Modified 2023-11-08

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CVSS v3

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CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H

CVSS v4 NEW

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not yet in upstream

VIR risk

5.5

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.

Predictions

Exploit likelihood

30%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

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OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Arch Fixed 1 release

Version	Status	Fixed in
—	Fixed	`0.12.19-1`

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`0.12.19-1`
sid	Fixed	`0.12.19-1`
forky	Fixed	`0.12.19-1`
bullseye	Fixed	`0.12.19-1`
bookworm	Fixed	`0.12.19-1`

Package impact

Ecosystem	Package	Vulnerable	Fixed
PyPI	bottle	`<0.12.19`	`0.12.19`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.