CVE-2025-27220

Publication date 4 March 2025

Last updated 11 July 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

4.0 · Medium

Score breakdown

Description

In the CGI gem before 0.4.2 for Ruby, a Regular Expression Denial of Service (ReDoS) vulnerability exists in the Util#escapeElement method.

Read the notes from the security team

Status

Package Ubuntu Release Status
ruby2.3 25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
16.04 LTS xenial
Fixed 2.3.1-2~ubuntu16.04.16+esm10
ruby2.5 25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic
Fixed 2.5.1-1ubuntu1.16+esm4
ruby2.7 25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal
Fixed 2.7.0-5ubuntu1.18
ruby3.0 25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy
Fixed 3.0.2-7ubuntu2.10
20.04 LTS focal Not in release
ruby3.2 25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble
Fixed 3.2.3-1ubuntu0.24.04.5
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
ruby3.3 25.10 questing
Fixed 3.3.7-1ubuntu2
25.04 plucky
Fixed 3.3.7-1ubuntu2
24.10 oracular
Fixed 3.3.4-2ubuntu5.2
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
jruby 25.10 questing
Needs evaluation
25.04 plucky
Needs evaluation
24.10 oracular Ignored end of life, was needs-triage
24.04 LTS noble
Needs evaluation
22.04 LTS jammy Not in release
20.04 LTS focal
Needs evaluation
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Needs evaluation

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Notes

mdeslaur

fixed in CGI gem versions 0.3.5.1, 0.3.7, 0.4.2

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
ruby3.3

Severity score breakdown

Parameter Value
Base score 4.0 · Medium
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Changed
Confidentiality None
Integrity impact None
Availability impact Low
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L

References

Related Ubuntu Security Notices (USN)

Other references