CVE-2020-13987

Publication date 1 December 2020

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

An issue was discovered in Contiki through 3.0. An Out-of-Bounds Read vulnerability exists in the uIP TCP/IP Stack component when calculating the checksums for IP packets in upper_layer_chksum in net/ipv4/uip.c.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
open-iscsi	23.04 lunar	Fixed 2.1.3-1ubuntu1
	22.10 kinetic	Fixed 2.1.3-1ubuntu1
	22.04 LTS jammy	Fixed 2.1.3-1ubuntu1
	21.10 impish	Fixed 2.1.3-1ubuntu1
	21.04 hirsute	Fixed 2.1.3-1ubuntu1
	20.10 groovy	Ignored end of life
	20.04 LTS focal	Fixed 2.0.874-7.1ubuntu6.4
	18.04 LTS bionic	Fixed 2.0.874-5ubuntu2.11+esm1
	16.04 LTS xenial	Fixed 2.0.873+git0.3b4b4500-14ubuntu3.7+esm1
	14.04 LTS trusty	Not affected

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Notes

sbeattie

aka FSCT-2020-0009 issue in embedded copy of uIP

mdeslaur

per upstream "iscsiuio only uses uip for network "services", such as DHCP, ARP, etc, and not for normal TCP/IP communications"

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
open-iscsi	Upstream: e238397

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-6259-1
Open-iSCSI vulnerabilities
27 July 2023