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| author | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2025-01-11 23:22:40 +0100 |
|---|---|---|
| committer | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2025-01-14 14:59:45 +0100 |
| commit | 078d1410dd3307956638d9c90f40ec15032ef01f (patch) | |
| tree | 5b1bba6f7d7e9509a14642d9182b518ba40c8a2c /src/Core/CoreBase.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/CoreBase.h')
| -rw-r--r-- | src/Core/CoreBase.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/Core/CoreBase.h b/src/Core/CoreBase.h index 07d0f881..e4ff0a94 100644 --- a/src/Core/CoreBase.h +++ b/src/Core/CoreBase.h @@ -80,6 +80,16 @@ namespace VeraCrypt virtual void ForceUseDummySudoPassword (bool useDummySudoPassword) { UseDummySudoPassword = useDummySudoPassword;} virtual bool GetUseDummySudoPassword () const { return UseDummySudoPassword;} +#if defined(TC_UNIX) + virtual bool IsProtectedSystemDirectory (const DirectoryPath &directory) const = 0; + virtual bool IsDirectoryOnUserPath(const DirectoryPath &directory) const = 0; + virtual void SetAllowInsecureMount (bool allowInsecureMount) { AllowInsecureMount = allowInsecureMount; } + virtual bool GetAllowInsecureMount () const { return AllowInsecureMount; } +#endif + + virtual void SetUserEnvPATH (const string &path) { UserEnvPATH = path; } + virtual string GetUserEnvPATH () const { return UserEnvPATH; } + Event VolumeDismountedEvent; Event VolumeMountedEvent; Event WarningEvent; @@ -89,8 +99,13 @@ namespace VeraCrypt bool DeviceChangeInProgress; FilePath ApplicationExecutablePath; + string UserEnvPATH; bool UseDummySudoPassword; +#if defined(TC_UNIX) + bool AllowInsecureMount; +#endif + private: CoreBase (const CoreBase &); CoreBase &operator= (const CoreBase &); |