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Vigil@nce - Linux kernel: denial of service via xfs_attr_shortform_verify
September 2020 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer/Computer-vulnerabilities-watch-and-alert
SYNTHESIS OF THE VULNERABILITY
– Impacted products: Fedora, Linux.
– Severity: 1/4.
– Consequences: denial of service on server, denial of service on
service.
– Provenance: user shell.
– Confidence: confirmed by the editor (5/5).
– Creation date: 08/09/2020.
DESCRIPTION OF THE VULNERABILITY
An attacker can trigger a fatal error via xfs_attr_shortform_verify()
of the Linux kernel, in order to trigger a denial of service.
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