Multiple vulnerabilities in uIP and Contiki OS
| Risk | Critical |
| Patch available | NO |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2020-17437 CVE-2020-17438 CVE-2020-13987 |
| CWE-ID | CWE-787 CWE-125 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
uIP Server applications / Other server solutions Contiki OS Operating systems & Components / Operating system |
| Vendor |
Adam Dunkels contiki-os.org |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Out-of-bounds write
EUVDB-ID: #VU59115
Risk: Critical
CVSSv4.0: 8.1 [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/E:U/U:Red]
CVE-ID: CVE-2020-17437
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing TCP packets with Urgent flag. A remote attacker can send specially crafted traffic to the system, trigger an out-of-bounds write and execute arbitrary code on the target system.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsuIP: 1.0
Contiki OS: 3.0
CPE2.3 External linkshttps://cert-portal.siemens.com/productcert/pdf/ssa-541018.pdf
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01
https://www.kb.cert.org/vuls/id/815128
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Out-of-bounds write
EUVDB-ID: #VU59116
Risk: Critical
CVSSv4.0: 8.1 [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/E:U/U:Red]
CVE-ID: CVE-2020-17438
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
DescriptionThe 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.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsuIP: 1.0
Contiki OS: 3.0
CPE2.3 External linkshttps://us-cert.cisa.gov/ics/advisories/icsa-20-343-01
https://www.kb.cert.org/vuls/id/815128
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Out-of-bounds read
EUVDB-ID: #VU59117
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-13987
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition in the uIP TCP/IP Stack component when calculating the checksums for IP packets in upper_layer_chksum in net/ipv4/uip.c.
A remote attacker can send specially crafted traffic to the system, trigger an out-of-bounds read error and perform a denial of service (DoS) attack.
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsContiki OS: 3.0
uIP: 1.0
CPE2.3 External linkshttps://cert-portal.siemens.com/productcert/pdf/ssa-541018.pdf
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01
https://www.kb.cert.org/vuls/id/815128
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
