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Security Advisory - SegmentSmack Vulnerability in Linux Kernel

  • SA No:huawei-sa-20181031-01-linux
  • Initial Release Date: Oct 31, 2018
  • Last Release Date: Dec 11, 2019

There is a DoS vulnerability in the Linux Kernel versions 4.9+ known as a SegmentSmack attack. Remote attackers may send TCP packets to Linux kernel to make it calls the very expensive functions tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() of the affected device which can lead to a denial of service. 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. (Vulnerability ID: HWPSIRT-2018-08114) 

This vulnerability has been assigned a Common Vulnerabilities and Exposures (CVE) ID: CVE-2018-5390. 
Huawei has released software updates to fix this vulnerability. This advisory is available at the following link: 
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20181031-01-linux-en

Product Name

Affected Version

Resolved Product and Version

Duke-L09

Duke-L09C10B187

DUK-L09 8.0.0.370(C10)

Duke-L09C432B189

DUK-L09 8.0.0.375(C432)

Duke-L09C636B189

DUK-L09 8.0.0.369(C636)

Emily-AL00A

6.0.1.3(C00)

Upgrade to 8.1.0.167(SP1C00)

8.1.0.105(SP6C00)

8.1.0.105D(SP6C00)

8.1.0.106(SP2C00)

8.1.0.106D(SP3C00)

8.1.0.107(SP5C00)

8.1.0.107(SP7C00)

8.1.0.107D(SP5C00)

8.1.0.108(SP2C00)

8.1.0.108(SP6C00)

8.1.0.108D(SP2C00)

8.1.0.109(SP5C00)

8.1.0.112(C00)

8.1.0.123(C00)

8.1.0.132(C00)

8.1.0.150(C00)

8.1.0.152D(C00)

8.1.0.153(C00)

8.1.0.165D(C00)

8.1.0.167(C00)

8.1.0.175(C00)

Upgrade to 9.0.0.125(C00E76R1P21T8)

EulerOS

2.1.11

Upgrade to 2.2.11.SPC2

2.1.6

2.2.RC3

2.2.11.SPC2

2.2.RC5

V200R002C10

V200R002C20

V200R003C00

Upgrade to V200R005C00SPC319B000

V200R003C00SPC200

V200R003C00SPC503

V200R003C00SPC509

V200R003C00SPC609

V200R005C00

V200R005C00SPC319B000

V200R005C00SPC100

V200R005C00SPC200

V200R005C00SPC300

V200R005C00SPC310

V200R005C00SPC317

V200R005C00SPC318

V200R007C00SPC200

V200R007C00SPC200B003

FusionCompute

6.3.0

Upgrade to 6.3.1

6.3.RC1

6.3.1

FusionSphere OpenStack

V100R006C00

Upgrade to V100R006C30SPC100B080

V100R006C00RC1

V100R006C00RC2

V100R006C00U1

V100R006C10

V100R006C10RC1

V100R006C10RC1B060

V100R006C10RC2

V100R006C10SPC002B010

V100R006C10SPC100

V100R006C10SPC110

V100R006C10SPC200

V100R006C10SPC200B030

V100R006C10SPC301

V100R006C10SPC500

V100R006C10SPC530

V100R006C10SPC600

V100R006C10U10

V100R006C10U20

V100R006C30

V100R006C30SPC100B080

V100R006C30SPC100

LON-L29D

LON-L29DC721B192

8.0.0.372(C721)

Laya-AL00EP

9.0.0.107(C786E107R1P16)

Upgrade to LYA-AL00 B166

Toronto-L21

Toronto-L21C10B173CUSTC10D001

Toronto-L21C10B176CUSTC10D001

Toronto-L21C432B177CUSTC432D001

Toronto-L21C432B181CUSTC432D001

Toronto-L21C569B174CUSTC569D001

Toronto-L21C569B180CUSTC569D001



A remote attacker may be able to trigger a denial-of-service condition.


The vulnerability classification has been performed by using the CVSSv3 scoring system (http://www.first.org/cvss/specification-document).

Base Score: 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Temporal Score: 6.5 (E:U/RL:O/RC:C)

Overall Score: 6.5


This vulnerability can be exploited only when the following conditions are present:

The attacker could continuous send two-way TCP sessions to the affected device.

Vulnerability details:

Remote attackers may send TCP packets to Linux kernel to make it calls the very expensive functions tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() of the affected device which can lead to a denial of service. 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.


Customers should contact Huawei TAC (Huawei Technical Assistance Center) to request the upgrades. For TAC contact information, please refer to Huawei worldwide website at http://www.huawei.com/en/psirt/report-vulnerabilities.

This vulnerability was publicly disclosed.


2019-12-11 V1.1 UPDATED Updated the "Software Versions and Fixes" section;
2018-10-31 V1.0 INITIAL


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