KLA10678
Multiple vulnerabilities in Google Chrome

Multiple serious vulnerabilities have been found in Google Chrome. Malicious users can exploit these vulnerabilities to bypass security restrictions cause denial of service or obtain sensitive information.

Below is a complete list of vulnerabilities

1. Improper DOM tree workaround at Blink can be exploited via a specially designed JavaScript code to bypass same origin policy;
2. Use-after-free vulnerabilities at PDFium can be exploited via annotation manipulations to cause denial of service ;
3. Use-after-free vulnerabilities at ServiceWorker can be exploited via callback manipulations to cause denial of service;
4. Improper dictionary objects cast at PDFium can be exploited via a specially designed PDF document to cause denial of service;
5. Lack of LocalStorage restrictions at Blink can be exlpoited remotely via a specially designed URL to obtain sensitive information;
6. Improper mapping error handling at libANGLE can be exploited remotely via device manipulations to cause denial of service;
7. Memory corruption at FFMpeg can be exploited remotely to cause denial of service via a specially designed WebM File;
8. Lack of CORS restrictions at Blink can be exploited remotely via a specially designed redirect to bypass security restrictions;
9. Multiple vulnerabilities at Google V8 and other Google Chrome components can be exploited to cause denial of service or conduct other impact.

Technical details

Vulnerability (1) related to ContainerNode::parserInsertBefore function in core/dom/ContainerNode.cpp and can be triggered by DOM tree insertion in certain cases where a parent node no longer contains a child node.

(2) can be triggered via mishandling of focused annotation in a PDF document. This vulnerability caused by error in CPDFSDK_PageView implementation in fpdfsdk/src/fsdk_mgr.cpp

Vulnerability (3) caused by use-after-free in content/browser/service_worker/embedded_worker_instance.cc

Vulnerability (4) caused by CPDF_Document::GetPage function in fpdfapi/fpdf_parser/fpdf_parser_document.cpp

(5) can be triggered via vectors related to blob: URL. This vulnerability caused by shouldTreatAsUniqueOrigin function in platform/weborigin/SecurityOrigin.cpp

Vulnerability (6) caused by Image11::map function in renderer/d3d/d3d11/Image11.cpp mishandling of mapping failures after device-lost event. This vulnerability can be triggered via vectors involved removed device.

update_dimensions function in libavcodec/vp8.c relies on a coefficient-partition count during multi-threaded operation which causes (7).

(8) can be triggered via a redirect. This vulnerability caused by lack of CORS restriction when font’s URL appears to be same-origin. Vulnerable code placed at CSSFontFaceSrcValue::fetch function in core/css/CSSFontFaceSrcValue.cpp

Google Chrome versions earlier than 46.0.2490.71 (all branches)

Update to the latest version. File with name old_chrome can be still detected after update. It caused by Google Chrome update policy which does not remove old versions when installing updates. Try to contact vendor for further delete instructions or ignore such kind of alerts at your own risk.
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