Buffer overflow in SonicWall Sma 200
CVE-2021-20045
A buffer overflow vulnerability in SMA100 sonicfiles RAC_COPY_TO (RacNumber 36) method allows a remote unauthenticated attacker to potentially execute code as the 'nobody' user in the appliance. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.252 (97.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.252 · newest: 0.252 · change: 0.000
Affected products
- SonicWall Sma 200
- SonicWall Sma 200 Firmware — versions 10.2.0.8-37sv, 10.2.1.1-19sv
- SonicWall Sma 210
- SonicWall Sma 210 Firmware — versions 10.2.0.8-37sv, 10.2.1.1-19sv
- SonicWall Sma 400
- SonicWall Sma 400 Firmware — versions 10.2.0.8-37sv, 10.2.1.1-19sv
- SonicWall Sma 410
- SonicWall Sma 410 Firmware — versions 10.2.0.8-37sv, 10.2.1.1-19sv
- SonicWall Sma 500v
- SonicWall Sma 500v Firmware — versions 10.2.0.8-37sv, 10.2.1.1-19sv
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026 (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-20045?
- CVE-2021-20045 is a critical-severity vulnerability in SonicWall Sma 200, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2021-12-08.
- How severe is CVE-2021-20045?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-20045 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.