-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Qualys Vulnerability & Malware Research Labs (VMRL) http://www.dissect.pe Memory corruption when Adobe Shockwave Player parses .dir media file CVE-2012-2029 INTRODUCTION Adobe Shockwave Player is the Adobe plugin to many different browsers to view rich-media content on the web including animations, interactive presentations, and online entertainment. Adobe Shockwave Player does not properly parse .dir media file, which causes a corruption in module IMLLib by opening a malformed file with an invalid value located in PoC repro01.dir at offset 0x2306. This problem was confirmed in the following versions of Adobe Shockwave Player and MacOS X, other versions may be also affected. Shockwave Player version 11.6.3r633, Module IMLLib.framework on MacOS X 10.7.2 (11C74) CVSS Scoring System The CVSS score is: 9 Base Score: 10 Temporal Score: 9 We used the following values to calculate the scores: Base score is: AV:N/AC:L/Au:N/C:C/I:C/A:C Temporal score is: E:POC/RL:U/RC:C TRIGGERING THE PROBLEM To trigger the problem a PoC file (repro01.dir) is available to interested parties. Use Firefox or Safari to open the file and reproduce the vulnerability. DETAILS Disassembly: (gdb) disas $pc Dump of assembler code for function memmove$VARIANT$sse42: 0x991539bd <memmove$VARIANT$sse42+0>: push %ebp 0x991539be <memmove$VARIANT$sse42+1>: mov %esp,%ebp 0x991539c0 <memmove$VARIANT$sse42+3>: push %esi 0x991539c1 <memmove$VARIANT$sse42+4>: push %edi 0x991539c2 <memmove$VARIANT$sse42+5>: mov 0x8(%ebp),%edi 0x991539c5 <memmove$VARIANT$sse42+8>: mov 0xc(%ebp),%esi 0x991539c8 <memmove$VARIANT$sse42+11>: mov 0x10(%ebp),%ecx 0x991539cb <memmove$VARIANT$sse42+14>: mov %edi,%edx 0x991539cd <memmove$VARIANT$sse42+16>: sub %esi,%edx 0x991539cf <memmove$VARIANT$sse42+18>: cmp %ecx,%edx 0x991539d1 <memmove$VARIANT$sse42+20>: jb 0x99153a01 <memmove$VARIANT$sse42+68> 0x991539d3 <memmove$VARIANT$sse42+22>: cmp $0x50,%ecx 0x991539d6 <memmove$VARIANT$sse42+25>: ja 0x99153a06 <memmove$VARIANT$sse42+73> 0x991539d8 <memmove$VARIANT$sse42+27>: mov %ecx,%edx 0x991539da <memmove$VARIANT$sse42+29>: shr $0x2,%ecx 0x991539dd <memmove$VARIANT$sse42+32>: je 0x991539ec <memmove$VARIANT$sse42+47> 0x991539df <memmove$VARIANT$sse42+34>: mov (%esi),%eax <----- Crash here Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x3f5d8935 0x991539df in memmove$VARIANT$sse42 () (gdb) bt #0 0x991539df in memmove$VARIANT$sse42 () #1 0x0452eb61 in imPostQuitMessage () #2 0x045079f5 in imMemCopy () #3 0x070f414d in VListGetNumEntries () #4 0x0700b93a in TELscriptRef_GetPropertyInitsAsHandle () #5 0x0709b6b3 in MovieMemoryDispose () #6 0x0703d409 in TELscriptRef_GetPropertyInitsAsHandle () #7 0x0703db71 in TELscriptRef_GetPropertyInitsAsHandle () #8 0x0705e4f5 in mmpRewind () #9 0x06fa1970 in MovieInstLoadMovie () #10 0x01f51f89 in main () #11 0x01f526fa in main () #12 0x04531a64 in imNPMessageHandleMacEvent () #13 0x01f507cf in main () #14 0x01f535d0 in main () #15 0x01f48bcc in dyld_stub_Gestalt () #16 0x996bedd9 in CAOpenGLLayerDraw () #17 0x996be842 in -[CAOpenGLLayer _display] () #18 0x9968dff5 in CA::Layer::display () #19 0x9968df11 in -[CALayer display] () #20 0x99685aec in CA::Layer::display_if_needed () #21 0x99684883 in CA::Context::commit_transaction () #22 0x99684594 in CA::Transaction::commit () #23 0x996843f8 in +[CATransaction commit] () #24 0x010838dd in nsCARenderer::Render () Previous frame inner to this frame (gdb could not unwind past this frame) (gdb) x/i $pc 0x991539df <memmove$VARIANT$sse42+34>: mov (%esi),%eax (gdb) i r $esi $eax esi 0x3f5d8935 1063094581 eax 0x4 4 CREDITS This vulnerability was discovered by Rodrigo Rubira Branco (http://twitter.com/bsdaemon) from the Qualys Vulnerability & Malware Research Labs (VMRL). -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.17 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk+qncAACgkQRpuC3B/O3qGHDwCeIT4yhw741QM5TRwH1WSD7bHF 0dYAn2IUJG6ADX9vOF5sreWRXmPO3fTO =O1Ew -----END PGP SIGNATURE-----
