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Amazon Linux AMI: CVE-2021-3178: Security patch for kernel (ALAS-2021-1480)

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Amazon Linux AMI: CVE-2021-3178: Security patch for kernel (ALAS-2021-1480)

Severity
6
CVSS
(AV:N/AC:L/Au:S/C:P/I:P/A:N)
Published
01/19/2021
Created
02/20/2021
Added
02/18/2021
Modified
10/14/2022

Description

** DISPUTED ** fs/nfsd/nfs3xdr.c in the Linux kernel through 5.10.8, when there is an NFS export of a subdirectory of a filesystem, allows remote attackers to traverse to other parts of the filesystem via READDIRPLUS. NOTE: some parties argue that such a subdirectory export is not intended to prevent this attack; see also the exports(5) no_subtree_check default behavior.

Solution(s)

  • amazon-linux-upgrade-kernel

References

  • ALAS-2021-1480
  • CVE-2021-3178
  • USN-4876-1
  • USN-4877-1
  • USN-4878-1
  • USN-4910-1
  • USN-4912-1
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