GHSA-8cgq-6mh2-7j6v
Escape Sequence Injection vulnerability in Rack lead to Possible Log Injection
At a glance
- Published
- Updated
- CVE
- CVE-2025-27111
- CVSS_V4
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Description
## Summary `Rack::Sendfile` can be exploited by crafting input that includes newline characters to manipulate log entries. ## Details The `Rack::Sendfile` middleware logs unsanitized header values from the `X-Sendfile-Type` header. An attacker can exploit this by injecting escape sequences (such as newline characters) into the header, resulting in log injection. ## Impact This vulnerability can distort log files, obscure attack traces, and complicate security auditing. ## Mitigation - Update to the latest version of Rack, or - Remove usage of `Rack::Sendfile`.
Affected packages
| Package | Versions |
|---|---|
| RubyGems · rack | introduced 0, fixed 2.2.12 |
| RubyGems · rack | introduced 3.0, fixed 3.0.13 |
| RubyGems · rack | introduced 3.1, fixed 3.1.11 |
References
- https://github.com/rack/rack/security/advisories/GHSA-8cgq-6mh2-7j6v WEB
- https://nvd.nist.gov/vuln/detail/CVE-2025-27111 ADVISORY
- https://github.com/rack/rack/commit/803aa221e8302719715e224f4476e438f2531a53 WEB
- https://github.com/rack/rack/commit/aeac570bb8080ca7b53b7f2e2f67498be7ebd30b WEB
- https://github.com/rack/rack/commit/b13bc6bfc7506aca3478dc5ac1c2ec6fc53f82a3 WEB
- https://github.com/rack/rack PACKAGE
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2025-27111.yml WEB
- https://lists.debian.org/debian-lts-announce/2025/03/msg00016.html WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |