This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis β
Q1What is this vulnerability? (Essence + Consequences)
π¨ **The Essence**: A DoS vulnerability in Asterisk's `chan_skinny.c` file. π₯ **Consequences**: Attackers send massive requests, causing **excessive virtual memory consumption**.β¦
π **Root Cause**: Resource exhaustion flaw in `chan_skinny.c`. π **CWE**: Not explicitly mapped in data, but effectively a **Resource Management Error** leading to Denial of Service via memory exhaustion.
Q3Who is affected? (Versions/Components)
π’ **Vendor**: Digium. π¦ **Products**: Asterisk Open Source & Certified Asterisk. π **Affected Versions**: Asterisk Open Source **13.18.2 and earlier**. (Check your version immediately!)
Q4What can hackers do? (Privileges/Data)
π― **Attacker Goal**: Denial of Service (DoS). π« **Impact**: System becomes unresponsive due to memory spikes. π **Privileges**: No RCE or data exfiltration mentioned. Just **service disruption**.
Q5Is exploitation threshold high? (Auth/Config)
β‘ **Exploitation Threshold**: Likely **Low** for network-accessible Skinny Client Control Protocol (SCCP) channels.β¦
π **Public Exploit**: No specific PoC code listed in data. π’ **References**: JIRA ticket `ASTERISK-27452` and SecurityFocus BID `102023` confirm the issue. Wild exploitation is possible via traffic flooding.
Q7How to self-check? (Features/Scanning)
π **Self-Check**: 1. Check Asterisk version (`< 13.18.2`). 2. Monitor for SCCP (`chan_skinny`) usage. 3. Look for sudden **virtual memory spikes** under load. π **Scanning**: Identify open SCCP ports (2000/tcp).
Q8Is it fixed officially? (Patch/Mitigation)
π‘οΈ **Official Fix**: YES. π₯ **Patch**: Digium released security update **AST-2017-013**. Debian LTS also issued DLA 1225-1. π **Action**: Upgrade to patched version immediately.
Q9What if no patch? (Workaround)
π§ **No Patch Workaround**: 1. **Disable** `chan_skinny` module if not used. 2. **Firewall**: Restrict access to SCCP ports. 3. **Rate Limit**: Limit request rates to prevent memory exhaustion.β¦
π₯ **Urgency**: **HIGH** for SCCP users. β οΈ **Priority**: Critical for availability. While no data loss, DoS disrupts business operations. π **Recommendation**: Patch ASAP if running affected versions.