Memory disclosure or crash via LLDP parsing
Published Jul 9, 2021 · Updated Aug 3, 2024
Out-of-bounds reads in SonicWall Switch 1.0.0.5-16 and earlier allow remote attackers on the same LAN to read memory or crash the switch. The LLDP handling path performs multiple reads beyond buffer boundaries while processing received protocol data; SonicWall has not disclosed the affected routines or fields. Exploitation requires Layer 2 access to the same LAN and can expose memory contents or destabilize the appliance, with no reported integrity impact.
Summary
What happened
Out-of-bounds reads in SonicWall Switch 1.0.0.5-16 and earlier allow remote attackers on the same LAN to read memory or crash the switch. The LLDP handling path performs multiple reads beyond buffer boundaries while processing received protocol data; SonicWall has not disclosed the affected routines or fields. Exploitation requires Layer 2 access to the same LAN and can expose memory contents or destabilize the appliance, with no reported integrity impact.
The record
- CVE
- CVE-2021-20024
- Published
- Jul 9, 2021
- Updated
- Aug 3, 2024
- Vendor
- SonicWall
- Product
- SonicWall Switch
- Classifications
- CWE-125, T1499
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 9, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.0.0.5-16 and earlier
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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