------------------------------------------------------------------------- Debian LTS Advisory DLA-3706-1 debian-lts@lists.debian.org https://www.debian.org/lts/security/ Markus Koschany January 04, 2024 https://wiki.debian.org/LTS ------------------------------------------------------------------------- Package : netatalk Version : 3.1.12~ds-3+deb10u5 CVE ID : CVE-2022-22995 Debian Bug : 1053545 Corentin BAYET, Etienne HELLUY-LAFONT and Luca MORO of Synacktiv discovered a symlink redirection vulnerability in Netatalk, the Apple Filing Protocol service. The create_appledesktop_folder function of netatalk can be used to unsafely move files outside the shared volume using the "mv" system utility. The create_appledesktop_folder function is called when netatalk is configured to use the legacy AppleDouble v2 format of file system meta data. By using the features of another file sharing protocol, like SMB, an attacker could abuse this primitive to create an arbitrary symbolic link and move it outside the share. The attacker could then reuse the created symlink to write arbitrary files on the targeted system. On the targeted device where it was demonstrated, writing arbitrary files on the system resulted in a remote code execution. For Debian 10 buster, this problem has been fixed in version 3.1.12~ds-3+deb10u5. We recommend that you upgrade your netatalk packages. For the detailed security status of netatalk please refer to its security tracker page at: https://security-tracker.debian.org/tracker/netatalk Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS
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