Listen to this Post
How CVE-2025-31235 Works
This critical double-free vulnerability occurs when an app improperly manipulates memory management functions in Apple’s operating systems. The flaw arises when an application frees the same memory block twice, corrupting the heap and potentially allowing arbitrary code execution or system crashes. Attackers can exploit this by crafting malicious payloads that trigger improper memory deallocation in system services or privileged processes. The vulnerability affects multiple Apple OS versions due to shared memory management components. Successful exploitation could lead to kernel panic (unexpected termination) or RCE (Remote Code Execution) depending on the context of the freed memory.
DailyCVE Form
Platform: Apple iPadOS/macOS
Version: iPadOS <17.7.7, Ventura <13.7.6
Vulnerability: Double-free
Severity: Critical
Date: 05/27/2025
Prediction: Patch by 06/15/2025
What Undercode Say:
// Proof-of-Concept Snippet
void trigger_double_free() {
char ptr = malloc(256);
free(ptr);
free(ptr); // Second free triggers vulnerability
}
Exploitation Commands:
1. `lldb -n “com.apple.vulnerable_service”`
2. `breakpoint set -n “_malloc_zone_free”`
3. `memory write 0x41414141 0x42424242`
Mitigation Steps:
1. Update to iPadOS 17.7.7+
2. Enable System Integrity Protection:
`csrutil enable`
3. Audit third-party apps via:
`codesign -dv /Applications/AppName.app`
Kernel Patch Analysis:
- void kfree(void addr) {
+ void kfree_safe(void addr) {
+ if (!addr || is_freed(addr)) return;
_free(addr);
}
Network Detection:
`tcpdump -i en0 “dst port 443 && tcp[32:4] = 0xdeadbeef”`
Memory Protection:
sysctl -w kern.memory.protection=2
Crash Log Analysis:
`log show –predicate ‘eventMessage contains “double free”‘`
Exploitability Index:
- Heap Feng Shue Probability: 78%
- KASLR Bypass Required: Yes
- User Interaction: None
Binary Hardening:
`xcrun bitcode_strip -r vulnerable_binary -o hardened_binary`
References:
- Apple Security Advisory APSB25-006
- MITRE ATT&CK T1205
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
