e630f8c249
45 changes to exploits/shellcodes Cisco ASA - Crash PoC Cisco ASA - Crash (PoC) GNU binutils 2.26.1 - Integer Overflow (POC) GNU binutils 2.26.1 - Integer Overflow (PoC) K7 Total Security 15.1.0.305 - Device Driver Arbitrary Memory Read Linux Kernel - 'AF_PACKET' Use-After-Free Oracle Java JDK/JRE < 1.8.0.131 / Apache Xerces 2.11.0 - 'PDF/Docx' Server Side Denial of Service Microsoft Edge Chakra JIT - 'GlobOpt::OptTagChecks' Must Consider IsLoopPrePass Properly (2) Microsoft Edge Chakra JIT - Memory Corruption Microsoft Edge Chakra JIT - ImplicitCallFlags Checks Bypass Microsoft Edge Chakra JIT - Array Type Confusion via InitProto Instructions Microsoft Edge Chakra JIT - 'Array.prototype.reverse' Array Type Confusion Microsoft Edge Chakra JIT - 'NewScObjectNoCtor' Array Type Confusion Microsoft Edge Chakra JIT - 'LdThis' Type Confusion Pdfium - Pattern Shading Integer Overflows Pdfium - Out-of-Bounds Read with Shading Pattern Backed by Pattern Colorspace Chrome V8 - 'Runtime_RegExpReplace' Integer Overflow Hotspot Shield - Information Disclosure Linux Kernel (Ubuntu 17.04) - 'XFRM' Local Privilege Escalation Nitro Pro PDF - Multiple Vulnerabilities Odoo CRM 10.0 - Code Execution Dashlane - DLL Hijacking LightDM (Ubuntu 16.04/16.10) - Guest Account Local Privilege Escalation LightDM (Ubuntu 16.04/16.10) - 'Guest Account' Local Privilege Escalation Trustwave SWG 11.8.0.27 - SSH Unauthorized Access Ichano AtHome IP Cameras - Multiple Vulnerabilities Cisco UCS Platform Emulator 3.1(2ePE1) - Remote Code Execution Ikraus Anti Virus 2.16.7 - Remote Code Execution McAfee Security Scan Plus - Remote Command Execution OrientDB - Code Execution 360 Total Security - Local Privilege Escalation HPE Intelligent Management Center (iMC) 7.2 (E0403P10) - Code Execution Oracle Knowledge Management 12.1.1 < 12.2.5 - XML External Entity Leading To Remote Code Execution iBall WRA150N - Multiple Vulnerabilities GitStack - Unauthenticated Remote Code Execution Monstra CMS - Remote Code Execution Ametys CMS 4.0.2 - Unauthenticated Password Reset DblTek - Multiple Vulnerabilities FiberHome - Directory Traversal PHP Melody 2.7.3 - Multiple Vulnerabilities Tiandy IP Cameras 5.56.17.120 - Sensitive Information Disclosure Horde Groupware 5.2.21 - Unauthorized File Download QNAP HelpDesk < 1.1.12 - SQL Injection Hanbanggaoke IP Camera - Arbitrary Password Change McAfee LiveSafe 16.0.3 - Man In The Middle Registry Modification Leading to Remote Command Execution Sophos XG Firewall 16.05.4 MR-4 - Path Traversal Cisco DPC3928 Router - Arbitrary File Disclosure IDERA Uptime Monitor 7.8 - Multiple Vulnerabilities Geneko Routers - Unauthenticated Path Traversal Dasan Networks GPON ONT WiFi Router H640X versions 12.02-01121 / 2.77p1-1124 / 3.03p2-1146 - Unauthenticated Remote Code Execution
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2.5 KiB
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65 lines
No EOL
2.5 KiB
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Related to issue 1490 .
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When parsing ShadingPatterns; according to the specification they shouldn't be permitted to have a pattern colorspace as their base colorspace, but this is not validated, leading to out-of-bounds reads when rendering using the malformed shading pattern.
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bool CPDF_ShadingPattern::Load() {
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// ... snip ...
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CPDF_Object* pCSObj = pShadingDict->GetDirectObjectFor("ColorSpace");
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if (!pCSObj)
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return false;
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// No validation here on the type of colorspace.
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// ... snip ...
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return true;
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}
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If we now look at the code called during rendering of this pattern, we call through DrawFreeGouraudShading (cpdf_renderstatus.cpp), which will call CPDF_MeshStream::ReadVertex for each vertex in the shading pattern, which will call CPDF_MeshStream::ReadColor.
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std::tuple<float, float, float> CPDF_MeshStream::ReadColor() {
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ASSERT(ShouldCheckBPC(m_type));
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float color_value[kMaxComponents];
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for (uint32_t i = 0; i < m_nComponents; ++i) {
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color_value[i] = m_ColorMin[i] + m_BitStream->GetBits(m_nComponentBits) *
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(m_ColorMax[i] - m_ColorMin[i]) /
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m_ComponentMax;
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}
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// NB: color_value has only been initialised for the first m_nComponents elements
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float r = 0.0;
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float g = 0.0;
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float b = 0.0;
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if (m_funcs.empty()) {
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m_pCS->GetRGB(color_value, &r, &g, &b); // <-- we're interested in this call here
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return std::tuple<float, float, float>(r, g, b);
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}
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// ... snip ...
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}
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This call to GetRGB will be into the pattern cs
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bool CPDF_PatternCS::GetRGB(float* pBuf, float* R, float* G, float* B) const {
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if (m_pBaseCS) {
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ASSERT(m_pBaseCS->GetFamily() != PDFCS_PATTERN);
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PatternValue* pvalue = (PatternValue*)pBuf;
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// pvalue->m_Comps is now pointing 5 dwords into an 8 dword sized buffer, and p_pBaseCS expects to be able to read 8 dwords from it.
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if (m_pBaseCS->GetRGB(pvalue->m_Comps, R, G, B))
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return true;
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}
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*R = 0.75f;
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*G = 0.75f;
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*B = 0.75f;
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return false;
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}
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Originally reported without 90 day deadline as https://bugs.chromium.org/p/chromium/issues/detail?id=795251, since it wasn't clear that there was an easy way to use the oob-read to leak information in a way that was useful, deadline applied as of 15/12 after working out how to use this as an information leak for issue 1489 .
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Proof of Concept:
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https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/bin-sploits/44083.zip |