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CVE-2020-27861

HIGHCVSS 8.8/10EPSS 2.03%

Last modified

CVE-2020-27861 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Orbi 2.5.1.16 routers. Authentication is not required to exploit this vulnerability. EPSS estimates a 2.03% chance of exploitation in the next 30 days.

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Orbi 2.5.1.16 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the UA_Parser utility. A crafted Host Name option in a DHCP request can trigger execution of a system call composed from a user-supplied string. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11076.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
2.03%

78.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
NetgearCbk40 Firmware< 2.6.1.38
NetgearCbk43 Firmware< 2.6.1.38
NetgearCbr40 Firmware< 2.6.1.38
NetgearEx6200 Firmware< 1.0.1.82
NetgearEx7700 Firmware< 1.0.0.210
NetgearEx8000 Firmware< 1.0.1.224
NetgearRbk12 Firmware< 2.6.1.44
NetgearRbk13 Firmware< 2.6.1.44
NetgearRbk14 Firmware< 2.6.1.44
NetgearRbk15 Firmware< 2.6.1.44
NetgearRbr10 Firmware< 2.6.1.44
NetgearRbs10 Firmware< 2.6.1.44
NetgearRbk20w Firmware< 2.6.1.36
NetgearRbk23w Firmware< 2.6.1.36
NetgearRbk20 Router Firmware< 2.6.1.36
NetgearRbk20 Satellite Firmware< 2.6.1.38
NetgearRbk22 Router Firmware< 2.6.1.36
NetgearRbk22 Satellite Firmware< 2.6.1.38
NetgearRbk23 Router Firmware< 2.6.1.36
NetgearRbk23 Satellite Firmware< 2.6.1.38
NetgearRbr20 Firmware< 2.6.1.36
NetgearRbs20 Firmware< 2.6.1.38
NetgearRbk30 Firmware< 2.6.1.36
NetgearRbk33 Firmware< 2.6.1.36
NetgearRbk40 Router Firmware< 2.6.1.36
NetgearRbk40 Satellite Firmware< 2.6.1.38
NetgearRbk43 Router Firmware< 2.6.1.36
NetgearRbk43 Satellite Firmware< 2.6.1.38
NetgearRbk43s Router Firmware< 2.6.1.36
NetgearRbk43s Satellite Firmware< 2.6.1.38
NetgearRbk44 Router Firmware< 2.6.1.36
NetgearRbk44 Satellite Firmware< 2.6.1.38
NetgearRbr40 Firmware< 2.6.1.36
NetgearRbs40 Firmware< 2.6.1.38
NetgearRbk50 Firmware< 2.6.1.40
NetgearRbk50v Firmware< 2.6.1.40
NetgearRbk52w Firmware< 2.6.1.40
NetgearRbr50 Firmware< 2.6.1.40
NetgearRbs50 Firmware< 2.6.1.40

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-27861?
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Orbi 2.5.1.16 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the UA_Parser utility. A crafted Host Name option in a DHCP request can trigger execution of a system call composed from a user-supplied string. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11076.
How severe is CVE-2020-27861?
CVE-2020-27861 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.03% probability of exploitation in the next 30 days.
How do I fix CVE-2020-27861?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-27861?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST