Vulnerability in ananthakumaran paisa

[ Description ]Official description

Paisa before 0.7.8 contains a path traversal vulnerability in the GetFile, GetSheet, DeleteBackups, and DeleteSheetBackups handlers that lets unauthenticated attackers read files and delete backups through ../ sequences in file names. Attackers can send crafted names to the editor file and delete_backups endpoints to read any server-readable file and remove backup files outside the journal or sheets directory.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• github.com/ananthakumaran/paisa
• github.com/ananthakumaran/paisa/blob/v0.7.7/internal/server/editor.go
• github.com/ananthakumaran/paisa/commit/035949351f7c0d0f90ecf767aa1e28b4d5a0ae31
• github.com/ananthakumaran/paisa/issues/420
• github.com/ananthakumaran/paisa/releases/tag/v0.7.8
• www.vulncheck.com/advisories/paisa-before-0.7.8-path-traversal-via-editor-and-sheet-api