Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 24.6%; technical severity is CVSS 9.8.
A buffer overflow vulnerability in SonicOS allows a remote attacker to cause Denial of Service (DoS) and potentially execute arbitrary code by sending a malicious request to the firewall. This vulnerability affected SonicOS Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3, SonicOSv 6.5.4.v and Gen 7 version 7.0.0.0.
Who should care
- Teams operating SonicOS, Sonicosv
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether SonicOS, Sonicosv is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- SonicWall Security advisory SNWLID 2020 0010
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteAutomated link verification has not completed for this guidance yet.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-120
- Affected versions
- SonicWall SonicOS (End Including 6.0.5.3 | Start Including 6.5.0.0, End Including 6.5.1.11 | Start Including 6.5.4.0, End Including 6.5.4.7 | Version 7.0.0.0); SonicWall Sonicosv (End Including 6.5.4.4)
- Fixed versions
- No explicit fixed version is currently recorded.
- Published
- 12 October 2020
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 24.6%
- Signal calculated at 78