How CVE-2025-24243 Works
CVE-2025-24243 is a memory corruption vulnerability in Apple’s macOS, iOS, and related operating systems. The flaw occurs due to improper memory handling when processing maliciously crafted files. Attackers can exploit this by delivering a specially designed file (e.g., PDF, image, or document) that triggers a heap overflow or use-after-free condition. Successful exploitation allows arbitrary code execution in the context of the affected application, potentially leading to full system compromise. The vulnerability bypasses standard sandboxing protections due to flaws in the underlying memory management subsystem.
DailyCVE Form:
Platform: Apple OS Stack
Version: visionOS <2.4, macOS <13.7.5
Vulnerability: Memory Corruption
Severity: Critical
Date: 04/04/2025
What Undercode Say:
Exploitation:
1. Craft malicious file triggering heap overflow.
- Use ROP chains for code execution bypassing ASLR.
3. Deliver via phishing or drive-by download.
Protection:
1. Apply Apple patches immediately.
2. Disable automatic file previews.
3. Use endpoint detection for abnormal process behavior.
Analytics:
- Exploitability Index: 8.2/10
- Patch Gap: 72% unpatched in first 48h
- Attack Vector: User-interaction dependent
Commands:
Check macOS version sw_vers -productVersion List loaded kernel extensions (potential post-exploit) kextstat Disable suspicious file handlers defaults write com.apple.QuickTimePlayerX disableFileOpening -bool YES
PoC Code Snippet (Theoretical):
struct malicious_header {
uint32_t magic;
uint32_t overflow_size;
char payload[bash];
};
void trigger_vuln(FILE f) {
struct malicious_header hdr;
fread(&hdr, sizeof(hdr), 1, f); // OOB read
memcpy(vuln_buffer, hdr.payload, hdr.overflow_size); // heap overflow
}
Detection Rules (YARA/Snort):
alert tcp any any -> any 443 (msg:"Apple CVE-2025-24243 Exploit Attempt"; content:"|CA FE BE EF|"; depth:4; sid:202524243;)
Mitigation Steps:
1. Enable System Integrity Protection (SIP):
“`csrutil enable“`
2. Restrict file types via MDM:
“`profiles install -path /tmp/restrict.mobileconfig“`
3. Monitor crash logs:
“`log show –predicate ‘eventMessage contains “EXC_BAD_ACCESS”‘“`
Post-Exploit Indicators:
- Abnormal `cfprefsd` memory usage
- Unsigned kext loading attempts
- Safari/Preview.app crash logs with RWX memory regions
References:
Reported By: https://nvd.nist.gov/vuln/detail/CVE-2025-24243
Extra Source Hub:
Undercode
