Device reboot via malformed UDP packet handling
Published Sep 25, 2024 · Updated Sep 25, 2024
Out-of-bounds write in Cisco SD-WAN vEdge Software allows man-in-the-middle attackers to reboot affected routers with crafted UDP traffic. The UDP packet validation code incorrectly handles a specific malformed packet, writes beyond a buffer boundary, and forces the device to restart. A machine-in-the-middle position is required; a successful attempt interrupts service while the affected router reboots.
Summary
What happened
Out-of-bounds write in Cisco SD-WAN vEdge Software allows man-in-the-middle attackers to reboot affected routers with crafted UDP traffic. The UDP packet validation code incorrectly handles a specific malformed packet, writes beyond a buffer boundary, and forces the device to restart. A machine-in-the-middle position is required; a successful attempt interrupts service while the affected router reboots.
The record
- CVE
- CVE-2024-20496
- Published
- Sep 25, 2024
- Updated
- Sep 25, 2024
- Vendor
- ClamAV
- Product
- Cisco SD-WAN vEdge Router
- Classifications
- CWE-787, T1499.004
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 25, 2024CVE publishedPublication date reported by the CVE source.
- Sep 25, 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=18.2.0
- Affected versionversion=18.3.0
- Affected versionversion=18.3.1
- Affected versionversion=18.3.3
- Affected versionversion=18.3.4
- Affected versionversion=18.3.5
- Affected versionversion=18.3.6
- Affected versionversion=18.3.7
- Affected versionversion=18.3.8
- Affected versionversion=18.4.0
- Affected versionversion=18.4.1
- Affected versionversion=18.4.3
- Affected versionversion=18.4.302
- Affected versionversion=18.4.303
- Affected versionversion=18.4.4
- Affected versionversion=18.4.5
- Affected versionversion=18.4.6
- Affected versionversion=19.0.0
- Affected versionversion=19.0.1a
- Affected versionversion=19.1.0
- Affected versionversion=19.1.01
- Affected versionversion=19.2.0
- Affected versionversion=19.2.097
- Affected versionversion=19.2.098
- Affected versionversion=19.2.099
- Affected versionversion=19.2.1
- Affected versionversion=19.2.2
- Affected versionversion=19.2.3
- Affected versionversion=19.2.31
- Affected versionversion=19.2.32
- Affected versionversion=19.2.4
- Affected versionversion=19.2.929
- Affected versionversion=19.3.0
- Affected versionversion=20.1.1
- Affected versionversion=20.1.11
- Affected versionversion=20.1.12
- Affected versionversion=20.1.2
- Affected versionversion=20.1.3
- Affected versionversion=20.1.3.1
- Affected versionversion=20.3.1
- Affected versionversion=20.3.2
- Affected versionversion=20.3.3
- Affected versionversion=20.3.3.2
- Affected versionversion=20.3.4
- Affected versionversion=20.3.4.3
- Affected versionversion=20.3.5
- Affected versionversion=20.3.5.1
- Affected versionversion=20.3.6
- Affected versionversion=20.3.7
- Affected versionversion=20.3.7.1
- Affected versionversion=20.3.7.2
- Affected versionversion=20.3.8
- Affected versionversion=20.4.1
- Affected versionversion=20.4.1.1
- Affected versionversion=20.4.1.2
- Affected versionversion=20.4.2
- Affected versionversion=20.4.2.3
- Affected versionversion=20.5.1
- Affected versionversion=20.6.1
- Affected versionversion=20.6.1.2
- Affected versionversion=20.6.2
- Affected versionversion=20.6.3
- Affected versionversion=20.6.3.2
- Affected versionversion=20.6.3.3
- Affected versionversion=20.6.4
- Affected versionversion=20.6.4.1
- Affected versionversion=20.6.5
- Affected versionversion=20.6.5.1
- Affected versionversion=20.6.5.2
- Affected versionversion=20.6.5.3
- Affected versionversion=20.6.5.4
- Affected versionversion=20.7.1
- Affected versionversion=20.7.1.2
- Affected versionversion=20.7.2
- Affected versionversion=20.8.1
- Affected versionversion=20.9.1
- Affected versionversion=20.9.2
- Affected versionversion=20.9.2.2
- Affected versionversion=20.9.2.3
- Affected versionversion=20.9.3
- Affected versionversion=20.9.3.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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