Vulnerability Name:

CVE-2021-34991 (CCN-213426)

Assigned:2021-11-11
Published:2021-11-11
Updated:2021-11-17
Summary: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.
CVSS v3 Severity:8.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
7.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
8.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
7.7 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:8.3 High (CVSS v2 Vector: AV:A/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
8.3 High (CCN CVSS v2 Vector: AV:A/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-787
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2021-34991

Source: XF
Type: UNKNOWN
netgear-cve202134991-bo(213426)

Source: CCN
Type: Netgear Security Advisory: PSV-2021-0168
Pre-Authentication Buffer Overflow on Multiple Products

Source: MISC
Type: Vendor Advisory
https://kb.netgear.com/000064361/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Multiple-Products-PSV-2021-0168

Source: CCN
Type: ZDI-21-1303
NETGEAR R6400v2 UPnP uuid Stack-based Buffer Overflow Remote Code Execution Vulnerability

Source: MISC
Type: Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-21-1303/

Vulnerable Configuration:Configuration 1:
  • cpe:/o:netgear:ex3700_firmware:*:*:*:*:*:*:*:* (Version < 1.0.0.94)
  • AND
  • cpe:/h:netgear:ex3700:-:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/o:netgear:ex3800_firmware:*:*:*:*:*:*:*:* (Version < 1.0.0.94)
  • AND
  • cpe:/h:netgear:ex3800:-:*:*:*:*:*:*:*

    • Configuration 3:
  • cpe:/o:netgear:ex6120_firmware:*:*:*:*:*:*:*:* (Version < 1.0.0.66)
  • AND
  • cpe:/h:netgear:ex6120:-:*:*:*:*:*:*:*

    • Configuration 4:
  • cpe:/o:netgear:ex6130_firmware:*:*:*:*:*:*:*:* (Version < 1.0.0.66)
  • AND
  • cpe:/h:netgear:ex6130:-:*:*:*:*:*:*:*

    • Configuration 5:
  • cpe:/o:netgear:r6400_firmware:*:*:*:*:*:*:*:* (Version < 1.0.1.76)
  • AND
  • cpe:/h:netgear:r6400:-:*:*:*:*:*:*:*

    • Configuration 6:
  • cpe:/o:netgear:r6400v2_firmware:*:*:*:*:*:*:*:* (Version < 1.0.4.120)
  • AND
  • cpe:/h:netgear:r6400v2:-:*:*:*:*:*:*:*

    • Configuration 7:
  • cpe:/o:netgear:r6700v3_firmware:*:*:*:*:*:*:*:* (Version < 1.0.4.120)
  • AND
  • cpe:/h:netgear:r6700v3:-:*:*:*:*:*:*:*

    • Configuration 8:
  • cpe:/o:netgear:r6900p_firmware:*:*:*:*:*:*:*:* (Version < 1.3.3.142)
  • AND
  • cpe:/h:netgear:r6900p:-:*:*:*:*:*:*:*

    • Configuration 9:
  • cpe:/o:netgear:r7000_firmware:*:*:*:*:*:*:*:* (Version < 1.0.11.128)
  • AND
  • cpe:/h:netgear:r7000:-:*:*:*:*:*:*:*

    • Configuration 10:
  • cpe:/o:netgear:r7000p_firmware:*:*:*:*:*:*:*:* (Version < 1.3.3.142)
  • AND
  • cpe:/h:netgear:r7000p:-:*:*:*:*:*:*:*

    • Configuration 11:
  • cpe:/o:netgear:r7100lg_firmware:*:*:*:*:*:*:*:* (Version < 1.0.0.72)
  • AND
  • cpe:/h:netgear:r7100lg:-:*:*:*:*:*:*:*

    • Configuration 12:
  • cpe:/o:netgear:r7850_firmware:*:*:*:*:*:*:*:* (Version < 1.0.5.76)
  • AND
  • cpe:/h:netgear:r7850:-:*:*:*:*:*:*:*

    • Configuration 13:
  • cpe:/o:netgear:r7900p_firmware:*:*:*:*:*:*:*:* (Version < 1.4.2.84)
  • AND
  • cpe:/h:netgear:r7900p:-:*:*:*:*:*:*:*

    • Configuration 14:
  • cpe:/o:netgear:r7960p_firmware:*:*:*:*:*:*:*:* (Version < 1.4.2.84)
  • AND
  • cpe:/h:netgear:r7960p:-:*:*:*:*:*:*:*

    • Configuration 15:
  • cpe:/o:netgear:r8000_firmware:*:*:*:*:*:*:*:* (Version < 1.0.4.76)
  • AND
  • cpe:/h:netgear:r8000:-:*:*:*:*:*:*:*

    • Configuration 16:
  • cpe:/o:netgear:r8000p_firmware:*:*:*:*:*:*:*:* (Version < 1.4.2.84)
  • AND
  • cpe:/h:netgear:r8000p:-:*:*:*:*:*:*:*

    • Configuration 17:
  • cpe:/o:netgear:r8300_firmware:*:*:*:*:*:*:*:* (Version < 1.0.2.156)
  • AND
  • cpe:/h:netgear:r8300:-:*:*:*:*:*:*:*

    • Configuration 18:
  • cpe:/o:netgear:r8500_firmware:*:*:*:*:*:*:*:* (Version < 1.0.2.156)
  • AND
  • cpe:/h:netgear:r8500:-:*:*:*:*:*:*:*

    • Configuration 19:
  • cpe:/o:netgear:rax15_firmware:*:*:*:*:*:*:*:* (Version < 1.0.4.100)
  • AND
  • cpe:/h:netgear:rax15:-:*:*:*:*:*:*:*

    • Configuration 20:
  • cpe:/o:netgear:rax20_firmware:*:*:*:*:*:*:*:* (Version < 1.0.4.100)
  • AND
  • cpe:/h:netgear:rax20:-:*:*:*:*:*:*:*

    • Configuration 21:
  • cpe:/o:netgear:rax200_firmware:*:*:*:*:*:*:*:* (Version < 1.0.5.132)
  • AND
  • cpe:/h:netgear:rax200:-:*:*:*:*:*:*:*

    • Configuration 22:
  • cpe:/o:netgear:rax35v2_firmware:*:*:*:*:*:*:*:* (Version < 1.0.4.100)
  • AND
  • cpe:/h:netgear:rax35v2:-:*:*:*:*:*:*:*

    • Configuration 23:
  • cpe:/o:netgear:rax38v2_firmware:*:*:*:*:*:*:*:* (Version < 1.0.4.100)
  • AND
  • cpe:/h:netgear:rax38v2:-:*:*:*:*:*:*:*

    • Configuration 24:
  • cpe:/o:netgear:rax40v2_firmware:*:*:*:*:*:*:*:* (Version < 1.0.4.100)
  • AND
  • cpe:/h:netgear:rax40v2:-:*:*:*:*:*:*:*

    • Configuration 25:
  • cpe:/o:netgear:rax42_firmware:*:*:*:*:*:*:*:* (Version < 1.0.4.100)
  • AND
  • cpe:/h:netgear:rax42:-:*:*:*:*:*:*:*

    • Configuration 26:
  • cpe:/o:netgear:rax43_firmware:*:*:*:*:*:*:*:* (Version < 1.0.4.100)
  • AND
  • cpe:/h:netgear:rax43:-:*:*:*:*:*:*:*

    • Configuration 27:
  • cpe:/o:netgear:rax45_firmware:*:*:*:*:*:*:*:* (Version < 1.0.4.100)
  • AND
  • cpe:/h:netgear:rax45:-:*:*:*:*:*:*:*

    • Configuration 28:
  • cpe:/o:netgear:rax48_firmware:*:*:*:*:*:*:*:* (Version < 1.0.4.100)
  • AND
  • cpe:/h:netgear:rax48:-:*:*:*:*:*:*:*

    • Configuration 29:
  • cpe:/o:netgear:rax50_firmware:*:*:*:*:*:*:*:* (Version < 1.0.4.100)
  • AND
  • cpe:/h:netgear:rax50:-:*:*:*:*:*:*:*

    • Configuration 30:
  • cpe:/o:netgear:rax50s_firmware:*:*:*:*:*:*:*:* (Version < 1.0.4.100)
  • AND
  • cpe:/h:netgear:rax50s:-:*:*:*:*:*:*:*

    • Configuration 31:
  • cpe:/o:netgear:rax75_firmware:*:*:*:*:*:*:*:* (Version < 1.0.5.132)
  • AND
  • cpe:/h:netgear:rax75:-:*:*:*:*:*:*:*

    • Configuration 32:
  • cpe:/o:netgear:rax80_firmware:*:*:*:*:*:*:*:* (Version < 1.0.5.132)
  • AND
  • cpe:/h:netgear:rax80:-:*:*:*:*:*:*:*

    • Configuration 33:
  • cpe:/o:netgear:raxe450_firmware:*:*:*:*:*:*:*:* (Version < 1.0.8.70)
  • AND
  • cpe:/h:netgear:raxe450:-:*:*:*:*:*:*:*

    • Configuration 34:
  • cpe:/o:netgear:raxe500_firmware:*:*:*:*:*:*:*:* (Version < 1.0.8.70)
  • AND
  • cpe:/h:netgear:raxe500:-:*:*:*:*:*:*:*

    • Configuration 35:
  • cpe:/o:netgear:rs400_firmware:*:*:*:*:*:*:*:* (Version < 1.5.1.80)
  • AND
  • cpe:/h:netgear:rs400:-:*:*:*:*:*:*:*

    • Configuration 36:
  • cpe:/o:netgear:wndr3400v3_firmware:*:*:*:*:*:*:*:* (Version < 1.0.1.42)
  • AND
  • cpe:/h:netgear:wndr3400v3:-:*:*:*:*:*:*:*

    • Configuration 37:
  • cpe:/o:netgear:wnr3500lv2_firmware:*:*:*:*:*:*:*:* (Version < 1.2.0.70)
  • AND
  • cpe:/h:netgear:wnr3500lv2:-:*:*:*:*:*:*:*

    • Configuration 38:
  • cpe:/o:netgear:xr300_firmware:*:*:*:*:*:*:*:* (Version < 1.0.3.68)
  • AND
  • cpe:/h:netgear:xr300:-:*:*:*:*:*:*:*

    • Configuration 39:
  • cpe:/o:netgear:d6220_firmware:*:*:*:*:*:*:*:* (Version < 1.0.0.76)
  • AND
  • cpe:/h:netgear:d6220:-:*:*:*:*:*:*:*

    • Configuration 40:
  • cpe:/o:netgear:d6400_firmware:*:*:*:*:*:*:*:* (Version < 1.0.0.108)
  • AND
  • cpe:/h:netgear:d6400:-:*:*:*:*:*:*:*

    • Configuration 41:
  • cpe:/o:netgear:d7000v2_firmware:*:*:*:*:*:*:*:* (Version < 1.0.0.76)
  • AND
  • cpe:/h:netgear:d7000v2:-:*:*:*:*:*:*:*

    • Configuration 42:
  • cpe:/o:netgear:dgn2200v4_firmware:*:*:*:*:*:*:*:* (Version < 1.0.0.126)
  • AND
  • cpe:/h:netgear:dgn2200v4:-:*:*:*:*:*:*:*

    • Configuration 43:
  • cpe:/o:netgear:dc112a_firmware:*:*:*:*:*:*:*:* (Version < 1.0.0.62)
  • AND
  • cpe:/h:netgear:dc112a:-:*:*:*:*:*:*:*

    • Configuration 44:
  • cpe:/o:netgear:cax80_firmware:*:*:*:*:*:*:*:* (Version < 2.1.3.5)
  • AND
  • cpe:/h:netgear:cax80:-:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/h:netgear:r6400:v2:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    netgear ex3700 firmware *
    netgear ex3700 -
    netgear ex3800 firmware *
    netgear ex3800 -
    netgear ex6120 firmware *
    netgear ex6120 -
    netgear ex6130 firmware *
    netgear ex6130 -
    netgear r6400 firmware *
    netgear r6400 -
    netgear r6400v2 firmware *
    netgear r6400v2 -
    netgear r6700v3 firmware *
    netgear r6700v3 -
    netgear r6900p firmware *
    netgear r6900p -
    netgear r7000 firmware *
    netgear r7000 -
    netgear r7000p firmware *
    netgear r7000p -
    netgear r7100lg firmware *
    netgear r7100lg -
    netgear r7850 firmware *
    netgear r7850 -
    netgear r7900p firmware *
    netgear r7900p -
    netgear r7960p firmware *
    netgear r7960p -
    netgear r8000 firmware *
    netgear r8000 -
    netgear r8000p firmware *
    netgear r8000p -
    netgear r8300 firmware *
    netgear r8300 -
    netgear r8500 firmware *
    netgear r8500 -
    netgear rax15 firmware *
    netgear rax15 -
    netgear rax20 firmware *
    netgear rax20 -
    netgear rax200 firmware *
    netgear rax200 -
    netgear rax35v2 firmware *
    netgear rax35v2 -
    netgear rax38v2 firmware *
    netgear rax38v2 -
    netgear rax40v2 firmware *
    netgear rax40v2 -
    netgear rax42 firmware *
    netgear rax42 -
    netgear rax43 firmware *
    netgear rax43 -
    netgear rax45 firmware *
    netgear rax45 -
    netgear rax48 firmware *
    netgear rax48 -
    netgear rax50 firmware *
    netgear rax50 -
    netgear rax50s firmware *
    netgear rax50s -
    netgear rax75 firmware *
    netgear rax75 -
    netgear rax80 firmware *
    netgear rax80 -
    netgear raxe450 firmware *
    netgear raxe450 -
    netgear raxe500 firmware *
    netgear raxe500 -
    netgear rs400 firmware *
    netgear rs400 -
    netgear wndr3400v3 firmware *
    netgear wndr3400v3 -
    netgear wnr3500lv2 firmware *
    netgear wnr3500lv2 -
    netgear xr300 firmware *
    netgear xr300 -
    netgear d6220 firmware *
    netgear d6220 -
    netgear d6400 firmware *
    netgear d6400 -
    netgear d7000v2 firmware *
    netgear d7000v2 -
    netgear dgn2200v4 firmware *
    netgear dgn2200v4 -
    netgear dc112a firmware *
    netgear dc112a -
    netgear cax80 firmware *
    netgear cax80 -
    netgear r6400 v2