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CVE-2020-17438

Published: Dec 11, 2020Updated: Nov 21, 2024 Sources: CVE List NVD BDU csafCWE-787
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
18.5%
Top 3.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. 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. By crafting a packet with specific values of the IP header length and the fragmentation offset, attackers can write into the .bss section of the program (past the statically allocated buffer that is used for storing the fragmented data) and cause a denial of service in uip_reass() in uip.c, or possibly execute arbitrary code on some target architectures.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-787

Affected Products

n/an/a
uipuip project
Library
OSS Libraries / generic-library
Suse Linux Enterprise ServerNovell Inc.
On-premOS
Operating Systems / linux-distro
uIPAdam Dunkels
Library
OSS Libraries / generic-library
Contiki OSСообщество свободного программного обеспечения
On-prem
Operating Systems / linux-distro
uip projectoss-projectOSS Librariesaka uip
novell inc.commercialUSOperating Systems
adam dunkelsindividual-devOSS Librariesaka uip, lwip, lwip
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://www.kb.cert.org/vuls/id/815128
kb.cert.org
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01
us-cert.cisa.gov
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2020/icsa-20-343-01.json
raw.githubusercontent.com
and 49 more references View all →

Timeline

Published
Dec 11, 2020
Last Updated
Nov 21, 2024

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