CVE-2021-34991

CVSS V2 High 8.3 CVSS V3 High 8.8
Description
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6400v2 1.0.4.106_10.0.80 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the UPnP service, which listens on TCP port 5000 by default. When parsing the uuid request header, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-14110.
Overview
  • CVE ID
  • CVE-2021-34991
  • Assigner
  • zdi-disclosures@trendmicro.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-11-15T16:15:09
  • Last Modified Date
  • 2021-11-17T16:33:07
Weakness Enumerations
CWE URL
CWE-787 http://cwe.mitre.org/data/definitions/787.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:netgear:ex3700_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.0.94
cpe:2.3:h:netgear:ex3700:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:ex3800_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.0.94
cpe:2.3:h:netgear:ex3800:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:ex6120_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.0.66
cpe:2.3:h:netgear:ex6120:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:ex6130_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.0.66
cpe:2.3:h:netgear:ex6130:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:r6400_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.1.76
cpe:2.3:h:netgear:r6400:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:r6400v2_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.4.120
cpe:2.3:h:netgear:r6400v2:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:r6700v3_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.4.120
cpe:2.3:h:netgear:r6700v3:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:r6900p_firmware:*:*:*:*:*:*:*:* 1 OR 1.3.3.142
cpe:2.3:h:netgear:r6900p:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:r7000_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.11.128
cpe:2.3:h:netgear:r7000:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:r7000p_firmware:*:*:*:*:*:*:*:* 1 OR 1.3.3.142
cpe:2.3:h:netgear:r7000p:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:r7100lg_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.0.72
cpe:2.3:h:netgear:r7100lg:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:r7850_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.5.76
cpe:2.3:h:netgear:r7850:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:r7900p_firmware:*:*:*:*:*:*:*:* 1 OR 1.4.2.84
cpe:2.3:h:netgear:r7900p:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:r7960p_firmware:*:*:*:*:*:*:*:* 1 OR 1.4.2.84
cpe:2.3:h:netgear:r7960p:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:r8000_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.4.76
cpe:2.3:h:netgear:r8000:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:r8000p_firmware:*:*:*:*:*:*:*:* 1 OR 1.4.2.84
cpe:2.3:h:netgear:r8000p:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:r8300_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.2.156
cpe:2.3:h:netgear:r8300:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:r8500_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.2.156
cpe:2.3:h:netgear:r8500:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:rax15_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.4.100
cpe:2.3:h:netgear:rax15:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:rax20_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.4.100
cpe:2.3:h:netgear:rax20:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:rax200_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.5.132
cpe:2.3:h:netgear:rax200:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:rax35v2_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.4.100
cpe:2.3:h:netgear:rax35v2:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:rax38v2_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.4.100
cpe:2.3:h:netgear:rax38v2:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:rax40v2_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.4.100
cpe:2.3:h:netgear:rax40v2:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:rax42_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.4.100
cpe:2.3:h:netgear:rax42:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:rax43_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.4.100
cpe:2.3:h:netgear:rax43:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:rax45_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.4.100
cpe:2.3:h:netgear:rax45:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:rax48_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.4.100
cpe:2.3:h:netgear:rax48:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:rax50_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.4.100
cpe:2.3:h:netgear:rax50:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:rax50s_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.4.100
cpe:2.3:h:netgear:rax50s:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:rax75_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.5.132
cpe:2.3:h:netgear:rax75:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:rax80_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.5.132
cpe:2.3:h:netgear:rax80:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:raxe450_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.8.70
cpe:2.3:h:netgear:raxe450:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:raxe500_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.8.70
cpe:2.3:h:netgear:raxe500:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:rs400_firmware:*:*:*:*:*:*:*:* 1 OR 1.5.1.80
cpe:2.3:h:netgear:rs400:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:wndr3400v3_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.1.42
cpe:2.3:h:netgear:wndr3400v3:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:wnr3500lv2_firmware:*:*:*:*:*:*:*:* 1 OR 1.2.0.70
cpe:2.3:h:netgear:wnr3500lv2:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:xr300_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.3.68
cpe:2.3:h:netgear:xr300:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:d6220_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.0.76
cpe:2.3:h:netgear:d6220:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:d6400_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.0.108
cpe:2.3:h:netgear:d6400:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:d7000v2_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.0.76
cpe:2.3:h:netgear:d7000v2:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:dgn2200v4_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.0.126
cpe:2.3:h:netgear:dgn2200v4:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:dc112a_firmware:*:*:*:*:*:*:*:* 1 OR 1.0.0.62
cpe:2.3:h:netgear:dc112a:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netgear:cax80_firmware:*:*:*:*:*:*:*:* 1 OR 2.1.3.5
cpe:2.3:h:netgear:cax80:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:A/AC:L/Au:N/C:C/I:C/A:C
  • Access Vector
  • ADJACENT_NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • COMPLETE
  • Integrity Impact
  • COMPLETE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 8.3
  • Severity
  • HIGH
  • Exploitability Score
  • 6.5
  • Impact Score
  • 10
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • ADJACENT_NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 8.8
  • Base Severity
  • HIGH
  • Exploitability Score
  • 2.8
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://www.zerodayinitiative.com/advisories/ZDI-21-1303/ Third Party Advisory VDB Entry
https://kb.netgear.com/000064361/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Multiple-Products-PSV-2021-0168 Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-34991
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34991
History
Created Old Value New Value Data Type Notes
2022-05-10 06:46:33 Added to TrackCVE
2022-12-05 14:32:27 2021-11-15T16:15Z 2021-11-15T16:15:09 CVE Published Date updated
2022-12-05 14:32:27 2021-11-17T16:33:07 CVE Modified Date updated
2022-12-05 14:32:27 Analyzed Vulnerability Status updated