Vulnerability Name:

CVE-2021-20046 (CCN-216886)

Assigned:2020-12-17
Published:2022-01-05
Updated:2022-01-19
Summary:A Stack-based buffer overflow in the SonicOS HTTP Content-Length response header allows a remote authenticated attacker to cause Denial of Service (DoS) and potentially results in code execution in the firewall. This vulnerability affected SonicOS Gen 5, Gen 6 and Gen 7 firmware versions.
CVSS v3 Severity:8.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
7.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Adjacent
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:6.5 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
4.6 Medium (CCN CVSS v2 Vector: AV:A/AC:H/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): High
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-787
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-20046

Source: XF
Type: UNKNOWN
sonicos-cve202120046-dos(216886)

Source: CCN
Type: SonicWall Security Advisory SNWLID-2021-0027
SonicOS Content-Length HTTP Header Stack Overflow Vulnerability

Source: CONFIRM
Type: Vendor Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0027

Vulnerable Configuration:Configuration 1:
  • cpe:/o:sonicwall:sonicos:*:*:*:*:*:*:*:* (Version <= 7.0.1-r146)
  • AND
  • cpe:/h:sonicwall:nsa_2650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_2700:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_3650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_3700:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_4650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_4700:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_5650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_6650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_6700:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_9250:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_9450:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_9650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz270:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz270w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz300:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz300p:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz300w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz350:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz350w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz370:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz370w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz400:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz400w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz470:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz470w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz500:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz500w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz570:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz570p:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz570w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz600:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz600p:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz670:-:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/o:sonicwall:sonicos:*:*:*:*:*:*:*:* (Version <= 7.0.1-5023-1349)
  • AND
  • cpe:/h:sonicwall:nsv_10:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsv_100:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsv_1600:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsv_200:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsv_25:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsv_270:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsv_300:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsv_400:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsv_470:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsv_50:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsv_800:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsv_870:-:*:*:*:*:*:*:*

    • Configuration 3:
  • cpe:/o:sonicwall:sonicos:*:*:*:*:*:*:*:* (Version <= 7.0.1-5018-r1715)
  • AND
  • cpe:/h:sonicwall:nssp_12400:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nssp_12800:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nssp_13700:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nssp_15700:-:*:*:*:*:*:*:*

    • Configuration 4:
  • cpe:/o:sonicwall:sonicos:*:*:*:*:*:*:*:* (Version <= 6.5.4.8-89n)
  • AND
  • cpe:/h:sonicwall:nsa_2650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_2700:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_3650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_3700:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_4650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_4700:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_5650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_6650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_6700:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_9250:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_9450:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_9650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:soho_250w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:supermassive_9200:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:supermassive_9400:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:supermassive_9600:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:supermassive_9800:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz270:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz270w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz300:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz300p:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz300w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz350:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz350w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz370:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz370w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz400:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz400w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz470:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz470w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz500:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz500w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz570:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz570p:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz570w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz600:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz600p:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz670:-:*:*:*:*:*:*:*

    • Configuration 5:
  • cpe:/o:sonicwall:sonicos:*:*:*:*:*:*:*:* (Version <= 6.5.1.13-1n)
  • AND
  • cpe:/h:sonicwall:nssp_12400:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nssp_12800:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:supermassive_9800:-:*:*:*:*:*:*:*

    • Configuration 6:
  • cpe:/o:sonicwall:sonicos:*:*:*:*:*:*:*:* (Version <= 6.0.5.3-94o)
  • AND
  • cpe:/h:sonicwall:supermassive_e10200:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:supermassive_e10400:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:supermassive_e10800:-:*:*:*:*:*:*:*

    • Configuration 7:
  • cpe:/o:sonicwall:sonicos:*:*:*:*:*:*:*:* (Version >= 5.0.0.0 and <= 5.9.1.13)
  • AND
  • cpe:/h:sonicwall:nsa_2650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_2700:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_3650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_3700:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_4650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_4700:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_5650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_6650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_6700:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_9250:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_9450:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:nsa_9650:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:soho_250:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:soho_250w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz270:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz270w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz300:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz300p:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz300w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz350:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz350w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz370:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz370w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz400:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz400w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz470:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz470w:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz500:-:*:*:*:*:*:*:*
  • OR cpe:/h:sonicwall:tz500w:-:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:sonicwall:sonicos:6.0.5.3-94o:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    sonicwall sonicos *
    sonicwall nsa 2650 -
    sonicwall nsa 2700 -
    sonicwall nsa 3650 -
    sonicwall nsa 3700 -
    sonicwall nsa 4650 -
    sonicwall nsa 4700 -
    sonicwall nsa 5650 -
    sonicwall nsa 6650 -
    sonicwall nsa 6700 -
    sonicwall nsa 9250 -
    sonicwall nsa 9450 -
    sonicwall nsa 9650 -
    sonicwall tz270 -
    sonicwall tz270w -
    sonicwall tz300 -
    sonicwall tz300p -
    sonicwall tz300w -
    sonicwall tz350 -
    sonicwall tz350w -
    sonicwall tz370 -
    sonicwall tz370w -
    sonicwall tz400 -
    sonicwall tz400w -
    sonicwall tz470 -
    sonicwall tz470w -
    sonicwall tz500 -
    sonicwall tz500w -
    sonicwall tz570 -
    sonicwall tz570p -
    sonicwall tz570w -
    sonicwall tz600 -
    sonicwall tz600p -
    sonicwall tz670 -
    sonicwall sonicos *
    sonicwall nsv 10 -
    sonicwall nsv 100 -
    sonicwall nsv 1600 -
    sonicwall nsv 200 -
    sonicwall nsv 25 -
    sonicwall nsv 270 -
    sonicwall nsv 300 -
    sonicwall nsv 400 -
    sonicwall nsv 470 -
    sonicwall nsv 50 -
    sonicwall nsv 800 -
    sonicwall nsv 870 -
    sonicwall sonicos *
    sonicwall nssp 12400 -
    sonicwall nssp 12800 -
    sonicwall nssp 13700 -
    sonicwall nssp 15700 -
    sonicwall sonicos *
    sonicwall nsa 2650 -
    sonicwall nsa 2700 -
    sonicwall nsa 3650 -
    sonicwall nsa 3700 -
    sonicwall nsa 4650 -
    sonicwall nsa 4700 -
    sonicwall nsa 5650 -
    sonicwall nsa 6650 -
    sonicwall nsa 6700 -
    sonicwall nsa 9250 -
    sonicwall nsa 9450 -
    sonicwall nsa 9650 -
    sonicwall soho 250w -
    sonicwall supermassive 9200 -
    sonicwall supermassive 9400 -
    sonicwall supermassive 9600 -
    sonicwall supermassive 9800 -
    sonicwall tz270 -
    sonicwall tz270w -
    sonicwall tz300 -
    sonicwall tz300p -
    sonicwall tz300w -
    sonicwall tz350 -
    sonicwall tz350w -
    sonicwall tz370 -
    sonicwall tz370w -
    sonicwall tz400 -
    sonicwall tz400w -
    sonicwall tz470 -
    sonicwall tz470w -
    sonicwall tz500 -
    sonicwall tz500w -
    sonicwall tz570 -
    sonicwall tz570p -
    sonicwall tz570w -
    sonicwall tz600 -
    sonicwall tz600p -
    sonicwall tz670 -
    sonicwall sonicos *
    sonicwall nssp 12400 -
    sonicwall nssp 12800 -
    sonicwall supermassive 9800 -
    sonicwall sonicos *
    sonicwall supermassive e10200 -
    sonicwall supermassive e10400 -
    sonicwall supermassive e10800 -
    sonicwall sonicos *
    sonicwall nsa 2650 -
    sonicwall nsa 2700 -
    sonicwall nsa 3650 -
    sonicwall nsa 3700 -
    sonicwall nsa 4650 -
    sonicwall nsa 4700 -
    sonicwall nsa 5650 -
    sonicwall nsa 6650 -
    sonicwall nsa 6700 -
    sonicwall nsa 9250 -
    sonicwall nsa 9450 -
    sonicwall nsa 9650 -
    sonicwall soho 250 -
    sonicwall soho 250w -
    sonicwall tz270 -
    sonicwall tz270w -
    sonicwall tz300 -
    sonicwall tz300p -
    sonicwall tz300w -
    sonicwall tz350 -
    sonicwall tz350w -
    sonicwall tz370 -
    sonicwall tz370w -
    sonicwall tz400 -
    sonicwall tz400w -
    sonicwall tz470 -
    sonicwall tz470w -
    sonicwall tz500 -
    sonicwall tz500w -
    sonicwall sonicos 6.0.5.3-94o