Service interruption via message-size integer overflow
Published Mar 10, 2020 · Updated Aug 5, 2024
Integer overflow in Siemens SIMATIC Communication Services allows remote attackers to terminate CCAgent with a crafted UDP datagram. The CCAgent parser adds attacker-controlled header and body lengths in 32 bits; wraparound passes its size check before memcpy_s receives an oversized length. When encrypted communication is enabled, an unauthenticated sender with network access can crash the service, which restarts after a delay.
Summary
What happened
Integer overflow in Siemens SIMATIC Communication Services allows remote attackers to terminate CCAgent with a crafted UDP datagram. The CCAgent parser adds attacker-controlled header and body lengths in 32 bits; wraparound passes its size check before memcpy_s receives an oversized length. When encrypted communication is enabled, an unauthenticated sender with network access can crash the service, which restarts after a delay.
The record
- CVE
- CVE-2019-19282
- Published
- Mar 10, 2020
- Updated
- Aug 5, 2024
- Vendor
- Siemens
- Product
- SIMATIC Route Control
- Classifications
- CWE-131, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 10, 2020CVE publishedPublication date reported by the CVE source.
- Aug 5, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=All versions
- Affected versionversion=All versions < V9.0 Upd4
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.
Weakness, pattern, technique
Public exploit references
- Tenable CCAgent integer-overflow proof of conceptfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo