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author | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2025-01-11 23:22:40 +0100 |
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committer | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2025-01-14 14:59:45 +0100 |
commit | 078d1410dd3307956638d9c90f40ec15032ef01f (patch) | |
tree | 5b1bba6f7d7e9509a14642d9182b518ba40c8a2c /src/Core/Unix/CoreUnix.h | |
parent | 2cca2e1dafa405addc3af8724baf8563f352ac1c (diff) | |
download | VeraCrypt-078d1410dd3307956638d9c90f40ec15032ef01f.tar.gz VeraCrypt-078d1410dd3307956638d9c90f40ec15032ef01f.zip |
Linux/FreeBSD: Prevent mounting volumes on system directories and PATH (CVE-2025-23021, reported by SivertPL @__tfr)
Added security checks to prevent mounting VeraCrypt volumes on system directories (like /usr/bin) or directories in the user's PATH, which could theoretically allow execution of malicious binaries instead of legitimate system binaries.
Key changes:
- Block mounting on protected system directories (/usr, /bin, /lib, etc.)
This restriction cannot be overridden
- Block mounting on directories present in user's PATH environment variable
This can be overridden with --allow-insecure-mount flag
- Add visual warnings (red border, "[INSECURE MODE]") when mounting on PATH directories is allowed
- Handle symlinks properly when checking paths
- Add new error messages for blocked mount points
To override PATH-based restrictions only (system directories remain protected):
veracrypt --allow-insecure-mount [options] volume mountpoint
Security Impact: Low to Medium
The attack requires either:
- User explicitly choosing a system directory as mount point instead of using VeraCrypt's default mount points
- Or attacker having both filesystem access to modify favorites configuration AND knowledge of the volume password
Default mount points are not affected by this vulnerability.
Security: CVE-2025-23021
Diffstat (limited to 'src/Core/Unix/CoreUnix.h')
-rw-r--r-- | src/Core/Unix/CoreUnix.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/Core/Unix/CoreUnix.h b/src/Core/Unix/CoreUnix.h index 0f1ab344..ae26bf0a 100644 --- a/src/Core/Unix/CoreUnix.h +++ b/src/Core/Unix/CoreUnix.h @@ -48,6 +48,8 @@ namespace VeraCrypt virtual void SetFileOwner (const FilesystemPath &path, const UserId &owner) const; virtual DirectoryPath SlotNumberToMountPoint (VolumeSlotNumber slotNumber) const; virtual void WipePasswordCache () const { throw NotApplicable (SRC_POS); } + virtual bool IsProtectedSystemDirectory (const DirectoryPath &directory) const; + virtual bool IsDirectoryOnUserPath(const DirectoryPath &directory) const; protected: virtual DevicePath AttachFileToLoopDevice (const FilePath &filePath, bool readOnly) const { throw NotApplicable (SRC_POS); } |