vulnerability
Oracle Linux: CVE-2018-5390: ELSA-2018-2390: kernel security and bug fix update (IMPORTANT) (Multiple Advisories)
Severity | CVSS | Published | Added | Modified |
---|---|---|---|---|
8 | (AV:N/AC:L/Au:N/C:N/I:N/A:C) | Aug 6, 2018 | Aug 7, 2018 | Jan 23, 2025 |
Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
Aug 6, 2018
Added
Aug 7, 2018
Modified
Jan 23, 2025
Description
Linux kernel versions 4.9+ can be forced to make very expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() for every incoming packet which can lead to a denial of service.
A flaw named SegmentSmack was found in the way the Linux kernel handled specially crafted TCP packets. A remote attacker could use this flaw to trigger time and calculation expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() functions by sending specially modified packets within ongoing TCP sessions which could lead to a CPU saturation and hence a denial of service on the system. Maintaining the denial of service condition requires continuous two-way TCP sessions to a reachable open port, thus the attacks cannot be performed using spoofed IP addresses.
A flaw named SegmentSmack was found in the way the Linux kernel handled specially crafted TCP packets. A remote attacker could use this flaw to trigger time and calculation expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() functions by sending specially modified packets within ongoing TCP sessions which could lead to a CPU saturation and hence a denial of service on the system. Maintaining the denial of service condition requires continuous two-way TCP sessions to a reachable open port, thus the attacks cannot be performed using spoofed IP addresses.
Solution(s)
oracle-linux-upgrade-kerneloracle-linux-upgrade-kernel-uek

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