CVE-2015-5539

published 2015-08-14

CVE-2015-5539: Use-after-free vulnerability in Adobe Flash Player before 18.0.0.232 on Windows and OS X and before 11.2.202.508 on Linux, Adobe AIR before 18.0.0.199, Adobe…

Priority P2 65 critical 10 CVSS 2.0

AV N AC L Au N C C I C A C

EXPLOIT

Use-after-free vulnerability in Adobe Flash Player before 18.0.0.232 on Windows and OS X and before 11.2.202.508 on Linux, Adobe AIR before 18.0.0.199, Adobe AIR SDK before 18.0.0.199, and Adobe AIR SDK & Compiler before 18.0.0.199 allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2015-5127, CVE-2015-5130, CVE-2015-5134, CVE-2015-5540, CVE-2015-5550, CVE-2015-5551, CVE-2015-5556, CVE-2015-5557, CVE-2015-5559, CVE-2015-5561, CVE-2015-5563, CVE-2015-5564, and CVE-2015-5565.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
adobe	air	<= 18.0.0.180	—
adobe	air_sdk	<= 18.0.0.180	—
adobe	air_sdk_compiler	<= 18.0.0.180	—
adobe	flash_player	<= 11.2.202.491	—
adobe	flash_player	<= 18.0.0.209	—
opensuse	evergreen	—	—

Detection & IOCs extracted from sources · hover to see the quote

url https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/37855.zip↗

• → Look for ActionScript 2 code invoking ASnative(2100, 200) on SharedObject data, which is the trigger for the use-after-free condition in NetConnection.uri handling. ↗
• → Detect SWF files that call ASnative(252, 1) (Array push native) via setInterval as a heap-grooming primitive following a use-after-free trigger. ↗
• → Suspicious SWF pairs named 'loadswf.swf' and 'setnum.swf' (compiled from slot.fla) served from the same web directory are indicative of this exploit's delivery pattern. ↗
• → Heap spray pattern: allocation of 200 BitmapData objects sized 1000x1000 in a loop is used to set up memory for exploitation; detect this pattern in decompiled AS2 SWF content. ↗
• → Use of ASSetPropFlags to strip all property flags on a SharedObject and its data slot (0, 0xff) is a known obfuscation/exploitation precursor in AS2-based Flash exploits. ↗

• · The PoC is noted to only reliably trigger on 64-bit systems due to heap layout differences; 32-bit exploitation would require a different heap setup. ↗
• · The exploit requires the SWF files to be hosted on a web server; local file execution may fail due to Flash's network sandboxing restrictions. ↗
• · The use-after-free is not limited to NetConnection.uri; it occurs across several other native AS2 class property setters that write internal atoms. ↗

CVSS provenance

nvd v2.0 10.0 CRITICAL AV:N/AC:L/Au:N/C:C/I:C/A:C

osv 10.0 CRITICAL

vendor_redhat 10.0 CRITICAL

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