Vulnerability Details : CVE-2021-20048
A Stack-based buffer overflow in the SonicOS SessionID HTTP 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.
Vulnerability category: OverflowMemory CorruptionDenial of service
Products affected by CVE-2021-20048
- cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
- cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
- cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
- cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
- cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
- cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
- cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-20048
0.32%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 70 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20048
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
6.5
|
MEDIUM | AV:N/AC:L/Au:S/C:P/I:P/A:P |
8.0
|
6.4
|
NIST | |
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
CWE ids for CVE-2021-20048
-
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).Assigned by: PSIRT@sonicwall.com (Secondary)
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The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-20048
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https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0028
Security AdvisoryVendor Advisory
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