Resource management error in Linux kernel - CVE-2019-15538
Published: August 28, 2019
Vulnerability identifier: #VU20420
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-15538
CWE-ID: CWE-399
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to buggy implementation of quotas in "xfs_setattr_nonsize" in the "fs/xfs/xfs_iops.c" file. A local attacker can send specially crafted requests to the affected system and perform denial of service attack.
Note: This vulnerability can be exploited remotely, if XFS filesystem is exported for instance via NFS.
How to mitigate CVE-2019-15538
Install updates from vendor's website.
Sources
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1fb254aa983bf190cfd685d40c64a480a9bafaee
- https://github.com/torvalds/linux/commit/1fb254aa983bf190cfd685d40c64a480a9bafaee
- https://lore.kernel.org/linux-xfs/20190823035528.GH1037422@magnolia/
- https://lore.kernel.org/linux-xfs/20190823192433.GA8736@eldamar.local