8.8

CVE-2021-27239

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Netgear ≫ D6220 Firmware Version < 1.0.0.68
   Netgear ≫ D6220 Version -
Netgear ≫ D6400 Firmware Version < 1.0.0.102
   Netgear ≫ D6400 Version -
Netgear ≫ D7000 Firmware Version < 1.0.0.66
   Netgear ≫ D7000 Version v2
Netgear ≫ D8500 Firmware Version < 1.0.3.60
   Netgear ≫ D8500 Version -
Netgear ≫ Dc112a Firmware Version < 1.0.0.54
   Netgear ≫ Dc112a Version -
Netgear ≫ Ex7000 Firmware Version < 1.0.1.94
   Netgear ≫ Ex7000 Version -
Netgear ≫ Ex7500 Firmware Version < 1.0.0.72
   Netgear ≫ Ex7500 Version -
Netgear ≫ R6250 Firmware Version < 1.0.4.48
   Netgear ≫ R6250 Version -
Netgear ≫ R6300 Firmware Version < 1.0.4.50
   Netgear ≫ R6300 Version v2
Netgear ≫ R6400 Firmware Version < 1.0.1.68
   Netgear ≫ R6400 Version -
Netgear ≫ R6400 Firmware Version < 1.0.4.102
   Netgear ≫ R6400 Version v2
Netgear ≫ R6700 Firmware Version < 1.0.4.102
   Netgear ≫ R6700 Version v3
Netgear ≫ R6900p Firmware Version < 1.3.2.132
   Netgear ≫ R6900p Version -
Netgear ≫ R7000 Firmware Version < 1.0.11.116
   Netgear ≫ R7000 Version -
Netgear ≫ R7000p Firmware Version < 1.3.2.132
   Netgear ≫ R7000p Version -
Netgear ≫ R7100lg Firmware Version < 1.0.0.64
   Netgear ≫ R7100lg Version -
Netgear ≫ R7850 Firmware Version < 1.0.5.68
   Netgear ≫ R7850 Version -
Netgear ≫ R7900 Firmware Version < 1.0.4.38
   Netgear ≫ R7900 Version -
Netgear ≫ R7900p Firmware Version < 1.4.1.68
   Netgear ≫ R7900p Version -
Netgear ≫ R7960p Firmware Version < 1.4.1.68
   Netgear ≫ R7960p Version -
Netgear ≫ R8000 Firmware Version < 1.0.4.68
   Netgear ≫ R8000 Version -
Netgear ≫ R8000p Firmware Version < 1.4.1.68
   Netgear ≫ R8000p Version -
Netgear ≫ R8300 Firmware Version < 1.0.2.144
   Netgear ≫ R8300 Version -
Netgear ≫ R8500 Firmware Version < 1.0.2.144
   Netgear ≫ R8500 Version -
Netgear ≫ Rax200 Firmware Version < 1.0.2.88
   Netgear ≫ Rax200 Version -
Netgear ≫ Rax75 Firmware Version < 1.0.3.102
   Netgear ≫ Rax75 Version -
Netgear ≫ Rax80 Firmware Version < 1.0.3.102
   Netgear ≫ Rax80 Version -
Netgear ≫ Rbr750 Firmware Version < 3.2.17.12
   Netgear ≫ Rbr750 Version -
Netgear ≫ Rbr850 Firmware Version < 3.2.17.12
   Netgear ≫ Rbr850 Version -
Netgear ≫ Rbs40v Firmware Version < 2.6.2.4
   Netgear ≫ Rbs40v Version -
Netgear ≫ Rbs750 Firmware Version < 3.2.17.12
   Netgear ≫ Rbs750 Version -
Netgear ≫ Rbs850 Firmware Version < 3.2.17.12
   Netgear ≫ Rbs850 Version -
Netgear ≫ Rs400 Firmware Version <= 1.5.0.68
   Netgear ≫ Rs400 Version -
Netgear ≫ Wndr3400 Firmware Version < 1.0.1.38
   Netgear ≫ Wndr3400 Version v3
Netgear ≫ Wnr3500l Firmware Version < 1.2.0.66
   Netgear ≫ Wnr3500l Version v2
Netgear ≫ Xr300 Firmware Version < 1.0.3.56
   Netgear ≫ Xr300 Version -
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.75% 0.499
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 8.8 2.8 5.9
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NIST 8.3 6.5 10
AV:A/AC:L/Au:N/C:C/I:C/A:C
Trend Micro 8.8 2.8 5.9
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-121 Stack-based Buffer Overflow

A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

https://kb.netgear.com/000062820/Security-Advisory-for-Stack-based-Buffer-Overflow-Remote-Code-Execution-Vulnerability-on-Some-Routers-PSV-2020-0432
Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-206/
Third Party Advisory
VDB Entry