جزئیات آسیب‌پذیری

Improper Handling of Case Sensitivity vulnerability in Erlang/OTP inets httpd allows a remote unauthenticated attacker to read files inside a mod_auth protected directory by requesting them with different casing, on deployments whose filesystem is case-insensitive. mod_auth:secret_path/3 decides whether a resolved filesystem path lies inside a protected directory block by running the configured directory path through re:run/3 without the caseless option. A request for /secret/file against a directory configured as /Secret therefore does not match, so the request is treated as unprotected and no authentication challenge is issued, while the filesystem resolves the differently cased path to the same file and mod_get serves it. Deployments on case-sensitive filesystems are unaffected, because there the filesystem itself rejects the mismatched casing. This issue affects OTP from OTP 17.0 before OTP 27.3.4.17, from OTP 28.0 before OTP 28.5.0.6, and from OTP 29.0 before OTP 29.0.6, corresponding to inets from 5.10 before 9.3.2.7, from 9.4 before 9.6.2.3, and from 9.7 before 9.7.2. Whether OTP before OTP 17.0, corresponding to inets before 5.10, is affected is unknown.

• https://github.com/erlang/otp/security/advisories/GHSA-mh78-93cr-jx8f vendor-advisoryrelated
• https://cna.erlef.org/cves/CVE-2026-73270.html related
• https://osv.dev/vulnerability/EEF-CVE-2026-73270 related
• https://www.erlang.org/doc/system/versions.html#order-of-versions x_version-scheme
• https://github.com/erlang/otp/commit/bac19eb3dbd96cc49b6d8cabc1c04248bf8c79f6 patch
• https://github.com/erlang/otp/commit/d8878dec0ececc2eab18e47bb18b472f224ca633 patch
• https://github.com/erlang/otp/commit/9641944a2efbf55bea760f8ff7ba777fe3a0961c patch