CVE-2021-27239

8.8HIGH

Key Information:

Vendor
Netgear
Status
Multiple Routers
Vendor
CVE Published:
29 March 2021

Summary

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6400 and R6700 firmware version 1.0.4.98 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the upnpd service, which listens on UDP port 1900 by default. A crafted MX header field in an SSDP message can trigger an overflow of a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11851.

Affected Version(s)

Multiple Routers firmware version 1.0.4.98

References

https://www.zerodayinitiative.com/advisories/ZDI-21-206/
x_refsource_MISC
https://kb.netgear.com/000062820/Security-Advisory-for-St...
x_refsource_MISC

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Anonymous
.