Corosync: corosync buffer overflow (CVE-2025-30472) #shorts
Summary
Welcome to today's cybersecurity podcast! In this episode, we'll be exploring the critical vulnerability identified as CVE-2025-30472. This vulnerability affects Corosync through version 3.1.9 and involves a stack-based buffer overflow under certain conditions. Stay tuned as we dive deeper into the details.
Product details
Corosync is an open-source cluster engine used in various high-availability systems. It plays a crucial role in node and token-based communication, especially in environments where reliable and consistent communication is paramount. Versions affected by this vulnerability include all versions up to 3.1.9.
Vulnerability type summary
The vulnerability in question is a stack-based buffer overflow, categorized under CWE-121. This type of vulnerability occurs when data is written outside the memory buffer's allocated space on the stack, potentially allowing attackers to corrupt data, crash applications, or execute arbitrary code.
Details of the vulnerability
CVE-2025-30472 presents a critical threat if Corosync's encryption is disabled or if an attacker knows the encryption key. Under these conditions, a large UDP packet can exploit the function orf_token_endian_convert within exec/totemsrp.c, leading to a stack-based buffer overflow. This flaw, if left unaddressed, opens the door for potential remote code execution attacks.
Conclusion
In summary, CVE-2025-30472 is a serious vulnerability affecting Corosync users, particularly those operating in environments where the encryption is compromised or disabled. Major distributions like Fedora have already issued security updates to mitigate this risk. We advise all users of Corosync to update to the latest version promptly to protect their systems. That's it for today's episode, stay secure, and keep your systems updated! Thank you for tuning in.
Watch the full video on YouTube: CVE-2025-30472
Remediation and exploitation details
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