PT-2023-3342 · Linux+9 · Linux Kernel+9
Hangyu Hua
·
Published
2023-05-29
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Updated
2024-06-26
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CVE-2023-35788
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.3.7
Description
The issue is related to the
fl set geneve opt() function in the net/sched/cls flower.c module of the Linux kernel's traffic control subsystem. It involves incorrect buffer boundary calculation during writing, which can be exploited by a remote attacker to cause a denial of service or potentially escalate privileges. The vulnerability can be triggered via TCA FLOWER KEY ENC OPTS GENEVE packets, affecting the flower classifier code and leading to an out-of-bounds write.Recommendations
For Linux kernel versions prior to 6.3.7, update to version 6.3.7 or later to resolve the issue. As a temporary workaround, consider restricting access to the
fl set geneve opt() function or the TCA FLOWER KEY ENC OPTS GENEVE packets to minimize the risk of exploitation.Exploit
Fix
DoS
Memory Corruption
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Linuxmint
Linux Kernel
Red Hat
Rocky Linux
Suse
Ubuntu