Unauthenticated service interruption via unchecked path length
Published May 28, 2024 · Updated Feb 13, 2025
Out-of-bounds write in AutomationDirect P3-550E firmware 1.2.10.9 allows remote attackers to interrupt service via crafted UDP packets. The IMM 0x0F04 mkdir handler at firmware offset 0xb69fc uses the attacker-controlled path length as an array index when appending a null terminator, allowing a write beyond the heap-allocated path buffer. The attack requires network reachability to the unauthenticated Programming Software Connection service on UDP port 9999 and can corrupt adjacent heap data or interrupt PLC operation.
Summary
What happened
Out-of-bounds write in AutomationDirect P3-550E firmware 1.2.10.9 allows remote attackers to interrupt service via crafted UDP packets. The IMM 0x0F04 mkdir handler at firmware offset 0xb69fc uses the attacker-controlled path length as an array index when appending a null terminator, allowing a write beyond the heap-allocated path buffer. The attack requires network reachability to the unauthenticated Programming Software Connection service on UDP port 9999 and can corrupt adjacent heap data or interrupt PLC operation.
The record
- CVE
- CVE-2024-24955
- Published
- May 28, 2024
- Updated
- Feb 13, 2025
- Vendor
- AutomationDirect
- Product
- P3-550E Firmware
- Classifications
- CWE-787, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 28, 2024CVE publishedPublication date reported by the CVE source.
- Feb 13, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=1.2.10.9
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
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Public exploit references
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Technologies
Your stack
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Your stack
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