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CVE-2023-34319

Public on 2023-08-09
Modified on 2024-01-13
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.

Severity
Medium
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CVSS v3 Base Score
6.5
See breakdown
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 kernel 2023-08-17 11:39 ALAS-2023-1803
Amazon Linux 1 kernel 2023-09-13 23:15 ALAS-2023-1827
Amazon Linux 2 - Core kernel 2023-08-17 11:58 ALAS2-2023-2206
Amazon Linux 2 - Core kernel 2023-09-27 22:48 ALAS2-2023-2268
Amazon Linux 2 - Kernel-5.10 Extra kernel 2023-08-31 22:50 ALAS2KERNEL-5.10-2023-039
Amazon Linux 2 - Kernel-5.15 Extra kernel 2023-08-31 22:46 ALAS2KERNEL-5.15-2023-026
Amazon Linux 2 - Kernel-5.4 Extra kernel 2023-09-27 22:59 ALAS2KERNEL-5.4-2023-054
Amazon Linux 2 - Kernel-5.4 Extra kernel 2023-08-17 17:04 ALAS2KERNEL-5.4-2023-051
Amazon Linux 2023 kernel 2023-08-31 21:45 ALAS2023-2023-330

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
NVD CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H