🛡️ CVE-2017-11871 — microsoft.chakracore

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-119 OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Chakra Core vulnerable to privilege escalation due to reading an invalid pointer

ChakraCore and Microsoft Edge in Windows 10 1703, 1709, and Windows Server, version 1709 allows an attacker to gain the same user rights as the current user, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". When trying to get inlineCaches for a ScriptFunctionWithInlineCache, if the function got redefered and was not reparsed, the function body (and inlineCache on function body) won’t be there, potentially leading to a privilege escalation.

This CVE ID is unique from CVE-2017-11836, CVE-2017-11837, CVE-2017-11838, CVE-2017-11839, CVE-2017-11840, CVE-2017-11841, CVE-2017-11843, CVE-2017-11846, CVE-2017-11858, CVE-2017-11859, CVE-2017-11861, CVE-2017-11862, CVE-2017-11866, CVE-2017-11869, CVE-2017-11870, and CVE-2017-11873.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2017-11871 is classified as CWE-119: Improper Restriction of Operations within Memory Buffer Bounds. A read or write is performed without confirming it stays inside the allocated buffer, corrupting adjacent memory.

Affected software

CVE-2017-11871 is recorded against 1 package.

  • microsoft.chakracore (fixed in 1.7.4)

Timeline and source

Published on 17 May 2022 and last revised on 16 February 2024. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Package)
portal.msrc.microsoft.com (Web)
web.archive.org (Web)
web.archive.org (Web)

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE CWE-119
Public Exploit ✅ No
Source OSV
Published 2022-05-17
Updated 2026-08-12
Modified 2024-02-16
Fix URL N/A

Affected Packages

Software From version Fixed in
microsoft.chakracore — 1.7.4

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