#VU92466 Improper privilege management in Linux kernel - CVE-2016-1575
Published: May 2, 2016 / Updated: June 20, 2024
Vulnerability identifier: #VU92466
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2016-1575
CWE-ID: CWE-269
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to improper privilege management error within the module_author(), ovl_entry_real(), ovl_dir_cache(), ovl_show_options(), ovl_parse_opt() and ovl_fill_super() functions in fs/overlayfs/super.c, within the ovl_cleanup_whiteouts() function in fs/overlayfs/readdir.c, within the ovl_setattr() and ovl_permission() functions in fs/overlayfs/inode.c, within the ovl_copy_xattr() function in fs/overlayfs/copy_up.c. A local user can execute arbitrary code.
Remediation
Install update from vendor's repository.
External links
- http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1575.html
- http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360
- https://launchpad.net/bugs/1534961
- http://www.openwall.com/lists/oss-security/2016/02/24/7
- http://www.openwall.com/lists/oss-security/2021/10/18/1