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Files from Ivan Fratric

Email addressifratric at google.com
First Active2007-03-08
Last Active2019-03-19
Microsoft Edge Flash click2play Bypass
Posted Mar 19, 2019
Authored by Ivan Fratric, Google Security Research

Microsoft Edge suffers from a Flash click2play bypass with CObjectElement::FinalCreateObject.

tags | exploit
advisories | CVE-2019-0612
MD5 | c94b41849f791f91a4e487bc8f455397
VBScript VbsErase Memory Corruption
Posted Mar 19, 2019
Authored by Ivan Fratric, Google Security Research

There is an issue in VBScript in the VbsErase function. In some cases, VbsErase fails to clear the argument variable properly, which can trivially lead to crafting a variable with the array type, but with a pointer controlled controlled by an attacker.

tags | exploit
advisories | CVE-2019-0667
MD5 | c197b2b4966090acde9b5638b0466c4a
Microsoft Edge Insecure click2play Whitelist
Posted Feb 19, 2019
Authored by Ivan Fratric, Google Security Research

Microsoft Edge has an issue where the default flash click2play whitelist is insecure.

tags | advisory
advisories | CVE-2019-0641
MD5 | 7aba8b302065571d5451116fa77bbb4c
Skia Buffer Overflow
Posted Feb 6, 2019
Authored by Ivan Fratric, Google Security Research

Incorrect convexity assumptions in Skia can lead to multiple buffer overflow vulnerabilities.

tags | exploit, overflow, vulnerability
MD5 | db5ddb42f112cdaac1ac2d70bcdebc9a
VBScript MSXML Policy Bypass
Posted Dec 19, 2018
Authored by Ivan Fratric, Google Security Research

Starting from Windows 10 Fall Creators Update, VBScript execution in IE 11 should be disabled for websites in the Internet Zone and the Restricted Sites Zone by default. However, the VBScript execution policy does not appear to cover VBScript code in MSXML xsl files which can still execute VBScript, even when loaded from the Internet Zone.

tags | exploit
systems | windows
advisories | CVE-2018-8619
MD5 | ce43b2ebae9f07a7d017a64ce3308636
VBScript VbsErase Reference Leak
Posted Dec 19, 2018
Authored by Ivan Fratric, Google Security Research

There is an reference leak in Microsoft VBScript that can be turned into an use-after-free given sufficient time. The vulnerability has been confirmed in Internet Explorer on various Windows versions with the latest patches applied.

tags | exploit
systems | windows
advisories | CVE-2018-8625
MD5 | 7a89325a4a9a9ce9b151cea5f6c4b348
Microsoft Windows jscript!JsArrayFunctionHeapSort Out-Of-Bounds Write
Posted Dec 18, 2018
Authored by Ivan Fratric, Google Security Research

There is an out-of-bounds write vulnerability in jscript.dll in the JsArrayFunctionHeapSort function. This vulnerability can be exploited through Internet Explorer or potentially through WPAD over local network.

tags | exploit, local
advisories | CVE-2018-8631
MD5 | 82afb637d0f91a3f4210fbcfc5b8c0ea
Microsoft VBScript rtFilter Out-Of-Bounds Read
Posted Nov 30, 2018
Authored by Ivan Fratric, Google Security Research

There is an out-of-bounds vulnerability in Microsoft VBScript in rtFilter. The vulnerability has been confirmed in Internet Explorer on Windows 7 with the latest patches applied.

tags | exploit
systems | windows, 7
advisories | CVE-2018-8552
MD5 | bb550cb6c47a76bff9745e2c8f95a914
Microsoft VBScript OLEAUT32!VariantClear / scrrun!VBADictionary::put_Item Use-After-Free
Posted Nov 30, 2018
Authored by Ivan Fratric, Google Security Research

There is a use-after-free vulnerability in Microsoft VBScript. The vulnerability has been confirmed in Internet Explorer on Windows 7 with the latest patches applied. There are possibly two vulnerabilities triggerable by the same proof of concept included.

tags | exploit, vulnerability, proof of concept
systems | windows, 7
advisories | CVE-2018-8544
MD5 | d336251c8030f4420eac4b15ed1e6a78
WebKit WebCore::InlineTextBox::paint Out-Of-Bounds Read
Posted Sep 25, 2018
Authored by Ivan Fratric, Google Security Research

WebKit suffers from a WebCore::InlineTextBox::paint out-of-bounds read vulnerability.

tags | exploit
advisories | CVE-2018-4328
MD5 | 48d7ddd807a5fd533454a6cf9658183b
WebKit WebCore::RenderMultiColumnSet::updateMinimumColumnHeight Use-After-Free
Posted Sep 25, 2018
Authored by Ivan Fratric, Google Security Research

WebKit suffers from a WebCore::RenderMultiColumnSet::updateMinimumColumnHeight use-after-free vulnerability.

tags | exploit
advisories | CVE-2018-4323
MD5 | ef9fbd1476a9ed5869403423f443b91c
WebKit WebCore::SVGTRefElement::updateReferencedText Use-After-Free
Posted Sep 25, 2018
Authored by Ivan Fratric, Google Security Research

WebKit suffers from a WebCore::SVGTRefElement::updateReferencedText use-after-free vulnerability.

tags | exploit
advisories | CVE-2018-4315
MD5 | 5e163bdb1d5fabd08aee1c2e22d9e5b2
WebKit WebCore::AXObjectCache::handleMenuItemSelected Use-After-Free
Posted Sep 25, 2018
Authored by Ivan Fratric, Google Security Research

WebKit suffers from a WebCore::AXObjectCache::handleMenuItemSelected use-after-free vulnerability.

tags | exploit
advisories | CVE-2018-4312
MD5 | f2e33906b39202fd5af35a10c6fa1608
WebKit WebCore::Node::ensureRareData Use-After-Free
Posted Sep 25, 2018
Authored by Ivan Fratric, Google Security Research

WebKit suffers from a WebCore::Node::ensureRareData use-after-free vulnerability.

tags | exploit
advisories | CVE-2018-4306
MD5 | 895cbd9c2699b63dc3e9313d4fbe8989
WebKit WebCore::SVGAnimateElementBase::resetAnimatedType Use-After-Free
Posted Sep 25, 2018
Authored by Ivan Fratric, Google Security Research

WebKit suffers from a WebCore::SVGAnimateElementBase::resetAnimatedType use-after-free vulnerability.

tags | exploit
advisories | CVE-2018-4314
MD5 | 5e48b10c894ac864f9f737dad8a51039
WebKit WebCore::RenderLayer::updateDescendantDependentFlags Use-After-Free
Posted Sep 25, 2018
Authored by Ivan Fratric, Google Security Research

WebKit suffers from a WebCore::RenderLayer::updateDescendantDependentFlags use-after-free vulnerability.

tags | exploit
advisories | CVE-2018-4317
MD5 | 2972313b3d644a72b92a046ec75eadf9
WebKit WebCore::SVGTextLayoutAttributes::context Use-After-Free
Posted Sep 25, 2018
Authored by Ivan Fratric, Google Security Research

WebKit suffers from a WebCore::SVGTextLayoutAttributes::context use-after-free vulnerability.

tags | exploit
advisories | CVE-2018-4318
MD5 | 8089cea300843f75b80b628759b8b832
WebKit WebCore::RenderTreeBuilder::removeAnonymousWrappersForInlineChildrenIfNeeded Use-After-Free
Posted Sep 25, 2018
Authored by Ivan Fratric, Google Security Research

WebKit suffers from a WebCore::RenderTreeBuilder::removeAnonymousWrappersForInlineChildrenIfNeeded use-after-free vulnerability.

tags | exploit
advisories | CVE-2018-4197
MD5 | 0f6661c3eb92987094c52de1d39f8f43
Microsoft Windows JScript RegExp.lastIndex Use-After-Free
Posted Aug 28, 2018
Authored by Ivan Fratric, Google Security Research

There is a use-after-free vulnerability in jscript.dll related to how the lastIndex property of a RegExp object is handled. This vulnerability can be exploited through Internet Explorer or potentially through WPAD over local network. The vulnerability has been reproduced on multiple Windows versions with the most recent patches applied.

tags | exploit, local
systems | windows
advisories | CVE-2018-8353
MD5 | b2cf3dec9e5bd796bccbeb593fafdabd
Skia SkScan::FillPath Heap Overflow
Posted Jul 26, 2018
Authored by Ivan Fratric, Google Security Research

There is a heap overflow in Skia when drawing paths with anti-aliasing turned off. This issue can be triggered in both Google Chrome and Mozilla Firefox by rendering a specially crafted SVG image. Proof of concepts included.

tags | exploit, overflow, proof of concept
advisories | CVE-2018-6126
MD5 | 189bd359ac88d1f7b3b45f86c7b34089
Skia / Firefox SkTDArray Integer Overflow
Posted May 24, 2018
Authored by Ivan Fratric, Google Security Research

Skia and Firefox suffer from an issue where an integer overflow in SkTDArray can lead to an out-of-bounds write.

tags | exploit, overflow
advisories | CVE-2018-5159
MD5 | f7eb1e6d567bfd69e4a654a5a1a0c0cf
WebKit WebCore::jsElementScrollHeightGette Use-After-Free
Posted May 1, 2018
Authored by Ivan Fratric, Google Security Research

There is a use-after-free security vulnerability in WebKit. The vulnerability was confirmed on ASan build of revision 227958 on OSX.

tags | exploit
systems | apple
advisories | CVE-2018-4200
MD5 | 35af2b53d57b81fe5f7927312787ad3f
Microsoft Edge OpenProcess() ACG Bypass
Posted Apr 17, 2018
Authored by Ivan Fratric, Google Security Research

Microsoft Edge suffers from an ACG bypass vulnerability with OpenProcess().

tags | exploit, bypass
MD5 | 0872aa70743c4a85442779d23b9462d1
Microsoft Windows jscript Use-After-Free
Posted Apr 5, 2018
Authored by Ivan Fratric, Google Security Research

Microsoft Windows suffers from multiple use-after-free issues in jscript Array methods.

tags | exploit
systems | windows
advisories | CVE-2018-0935
MD5 | 54dbc94c4392c67aa6871073166ebbc0
Microsoft Internet Explorer 11 RegExp.lastMatch Memory Disclosure
Posted Mar 21, 2018
Authored by Ivan Fratric, Google Security Research

Microsoft Internet Explorer 11 suffers from a RegExp.lastMatch memory disclosure vulnerability.

tags | exploit
advisories | CVE-2018-0891
MD5 | 0bbddb1e1bbe894461a1ab5b58369ce0
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