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Amazon Linux AMI: CVE-2023-34319: Security patch for kernel (ALAS-2023-1827)

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Amazon Linux AMI: CVE-2023-34319: Security patch for kernel (ALAS-2023-1827)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
09/13/2023
Created
10/05/2023
Added
10/04/2023
Modified
10/04/2023

Description

The fix for XSA-423 added logic to Linux'es netback driver to deal with

a frontend splitting a packet in a way such that not all of the headers

would come in one piece. Unfortunately the logic introduced there

didn't account for the extreme case of the entire packet being split

into as many pieces as permitted by the protocol, yet still being

smaller than the area that's specially dealt with to keep all (possible)

headers together. Such an unusual packet would therefore trigger a

buffer overrun in the driver.

Solution(s)

  • amazon-linux-upgrade-kernel

References

  • ALAS-2023-1827
  • CVE-2023-34319

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