CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
98.3%
Severity: High
Date : 2018-08-08
CVE-ID : CVE-2018-5390
Package : linux-hardened
Type : denial of service
Remote : Yes
Link : https://security.archlinux.org/AVG-750
The package linux-hardened before version 4.17.11.a-1 is vulnerable to
denial of service.
Upgrade to 4.17.11.a-1.
The problem has been fixed upstream in version 4.17.11.a.
None.
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 remote attacker is able to saturate the CPU and hence cause a denial
of service on the host system by sending specially modified packets
within ongoing TCP sessions.
https://www.kb.cert.org/vuls/id/962459
https://www.spinics.net/lists/netdev/msg514742.html
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=72cd43ba64fc172a443410ce01645895850844c8
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f4a3313d8e2ca9fd8d8f45e40a2903ba782607e7
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3d4bf93ac12003f9b8e1e2de37fe27983deebdcf
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8541b21e781a22dce52a74fef0b9bed00404a1cd
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=58152ecbbcc6a0ce7fddd5bf5f6ee535834ece0c
https://security.archlinux.org/CVE-2018-5390
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ArchLinux | any | any | linux-hardened | < 4.17.11.a-1 | UNKNOWN |
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3d4bf93ac12003f9b8e1e2de37fe27983deebdcf
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=58152ecbbcc6a0ce7fddd5bf5f6ee535834ece0c
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=72cd43ba64fc172a443410ce01645895850844c8
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8541b21e781a22dce52a74fef0b9bed00404a1cd
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f4a3313d8e2ca9fd8d8f45e40a2903ba782607e7
security.archlinux.org/AVG-750
security.archlinux.org/CVE-2018-5390
www.kb.cert.org/vuls/id/962459
www.spinics.net/lists/netdev/msg514742.html
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
98.3%