جزئیات آسیب‌پذیری

SSHFS is a network filesystem client for connecting to SSH servers. Prior to version 3.7.6, a rogue SFTP server can return absolute symlink targets or relative targets containing parent-directory components that SSHFS passes through FUSE for resolution by the client kernel against the local filesystem. The documented transform_symlinks mitigation does not contain relative targets because transform_symlink() returns early at sshfs.c:2181, while sshfs_readlink() at sshfs.c:2234 to sshfs.c:2236 otherwise copies the server-supplied link target to the kernel. A victim or victim-side tool that follows such a link through ordinary operations such as cp, rsync, backup tooling, or an editor can disclose readable local files back to the server or write server-controlled content to writable local files, potentially including startup or scheduled-task files. This issue is fixed in version 3.7.6.

• https://github.com/libfuse/sshfs/security/advisories/GHSA-pjv6-2c3f-r357 x_refsource_CONFIRM
• https://github.com/libfuse/sshfs/pull/361 x_refsource_MISC
• https://github.com/libfuse/sshfs/commit/bcd132f17ccf1b8592a229df797c9b08883fec26 x_refsource_MISC
• https://github.com/libfuse/sshfs/releases/tag/sshfs-3.7.6 x_refsource_MISC