Out-of-bounds write in uIP and Contiki OS - CVE-2020-17438

Vulnerability identifier: #VU59116

CSH Severity: Critical

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-17438

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing IP packets. The code that reassembles fragmented packets fails to properly validate the total length of an incoming packet specified in its IP header, as well as the fragmentation offset value specified in the IP header. A remote attacker can send specially crafted IP packets to the system, trigger an out-of-bounds write and execute arbitrary code on the target system.

uIP
Contiki OS
SUSE CaaS Platform
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Enterprise Storage
SUSE OpenStack Cloud
SUSE OpenStack Cloud Crowbar
SUSE Linux Enterprise Server for SAP
SUSE Linux Enterprise Server
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Module for Legacy Software
iscsiuio
iscsiuio-debuginfo
libopeniscsiusr0_2_0
libopeniscsiusr0_2_0-debuginfo
open-iscsi
open-iscsi-debuginfo
open-iscsi-debugsource
open-iscsi-devel
Dell EMC Unity Operating Environment (OE)
Dell EMC Unity VSA Operating Environment (OE)
Dell EMC Unity XT Operating Environment (OE)

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

iscsiuio - addressed in versions 0.7.8.2-12.27.2, 0.7.8.2-13.42.1
iscsiuio-debuginfo - addressed in versions 0.7.8.2-12.27.2, 0.7.8.2-13.42.1
libopeniscsiusr0_2_0 - addressed in versions 2.0.876-12.27.2, 2.0.876-13.42.1
libopeniscsiusr0_2_0-debuginfo - addressed in versions 2.0.876-12.27.2, 2.0.876-13.42.1
open-iscsi - addressed in versions 2.0.876-12.27.2, 2.0.876-13.42.1
open-iscsi-debuginfo - addressed in versions 2.0.876-12.27.2, 2.0.876-13.42.1
open-iscsi-debugsource - addressed in versions 2.0.876-12.27.2, 2.0.876-13.42.1
open-iscsi-devel - update to 2.0.876-13.42.1
Dell EMC Unity Operating Environment (OE) - update to 5.1.2.0.5.007
Dell EMC Unity VSA Operating Environment (OE) - update to 5.1.2.0.5.007
Dell EMC Unity XT Operating Environment (OE) - update to 5.1.2.0.5.007

• https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01
• https://www.kb.cert.org/vuls/id/815128

• Multiple vulnerabilities in uIP and Contiki OS
• Multiple vulnerabilities in Dell EMC Unity
• SUSE update for open-iscsi
• SUSE update for open-iscsi