Buffer overflow in SonicWall Sma 200
CVE-2021-20043
A Heap-based buffer overflow vulnerability in SonicWall SMA100 getBookmarks method allows a remote authenticated 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 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.233 (97.7th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.233 · newest: 0.233 · 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-2021-20043?
- CVE-2021-20043 is a high-severity vulnerability in SonicWall Sma 200, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2021-12-08.
- How severe is CVE-2021-20043?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-20043 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.