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CVE-2019-15538

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Date: August 25, 2019

An issue was discovered in xfs_setattr_nonsize in fs/xfs/xfs_iops.c in the Linux kernel through 5.2.9. XFS partially wedges when a chgrp fails on account of being out of disk quota. xfs_setattr_nonsize is failing to unlock the ILOCK after the xfs_qm_vop_chown_reserve call fails. This is primarily a local DoS attack vector, but it might result as well in remote DoS if the XFS filesystem is exported for instance via NFS.

Language: C

Severity Score

Related Resources (19)

http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
https://nvd.nist.gov/vuln/detail/CVE-2019-15538
https://usn.ubuntu.com/4144-1/
https://access.redhat.com/security/cve/CVE-2019-15538
https://github.com/torvalds/linux/commit/1fb254aa983bf190cfd685d40c64a480a9bafaee
https://lore.kernel.org/linux-xfs/20190823192433.GA8736@eldamar.local
https://usn.ubuntu.com/4147-1/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T4JZ6AEUKFWBHQAROGMQARJ274PQP2QP/
https://support.f5.com/csp/article/K32592426?utm_source=f5support&utm_medium=RSS
https://security.netapp.com/advisory/ntap-20191004-0001/
https://people.canonical.com/~ubuntu-security/cve/CVE-2019-15538
https://lists.debian.org/debian-lts-announce/2019/09/msg00015.html
https://security-tracker.debian.org/tracker/CVE-2019-15538
https://lore.kernel.org/linux-xfs/20190823035528.GH1037422@magnolia/
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1fb254aa983bf190cfd685d40c64a480a9bafaee
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/O3RUDQJXRJQVGHCGR4YZWTQ3ECBI7TXH/
https://lists.debian.org/debian-lts-announce/2019/09/msg00014.html
https://www.mend.io/vulnerability-database/CVE-2019-15538

Severity Score

Weakness Type (CWE)

Resource Management Errors

CWE-399

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): COMPLETE
Additional information:

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