HighPublic exploit

Chakra Scripting Engine Memory Corruption RCE in Microsoft Edge

IdentifiersCVE-2018-8617CWE-119

CVE-2018-8617 is a remote code execution vulnerability in the Chakra scripting engine used by Microsoft Edge and ChakraCore. According to the provided description, the flaw exists in the way the engine handles objects in memory, resulting in memory corruption. An attacker could trigger the issue by causing the scripting engine to process specially crafted script content, leading to corruption of in-memory object state and potentially redirecting execution flow. Microsoft refers to this issue as the "Chakra Scripting Engine Memory Corruption Vulnerability."

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can allow remote code execution in the context of the current user. In a browser scenario, this would typically be achieved by convincing a target to visit a malicious web page or otherwise render attacker-controlled script content in Microsoft Edge. The practical impact depends on the privileges of the user running the browser; users with administrative rights would face greater risk. Memory corruption flaws of this type can also cause browser instability or process crashes even when code execution is not achieved.

Mitigation

If you can’t patch tonight, do this now.

Until patches are fully deployed, reduce exposure by limiting use of Microsoft Edge on untrusted sites, enforcing least-privilege for end users, and using browser sandboxing and exploit mitigation features provided by the platform. Enterprise controls such as application isolation, web content filtering, and restricting execution of untrusted active content can reduce exploitability. Because exploitation would generally require attacker-supplied script to be processed, minimizing exposure to untrusted web content is a relevant temporary mitigation.

Remediation

Patch, then assume compromise.

Apply the Microsoft security update that addresses CVE-2018-8617 in affected versions of Microsoft Edge and ChakraCore. Remediation consists of updating the Chakra scripting engine to the vendor-fixed version so that object handling in memory no longer permits the corruption condition described in the advisory. Standard patch management should prioritize systems where Edge is in active use.

PUBLIC EXPLOITS

Exploits

No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.

VALID 0 / 1 TOTALView more in app

All candidate exploits were filtered out by Mallory's validation.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

Microsoft CorporationChakracoreapplication

Microsoft CorporationEdgeapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

3 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

3 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures1

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity3

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2018-8617

NVD

nvd.nist.gov/vuln/detail/CVE-2018-8617

MITRE CWE · CWE-119

cwe.mitre.org

Patch

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8617

Third Party Advisory

securityfocus.com/bid/106112

Third Party Advisory

exploit-db.com/exploits/46202

Chakra Scripting Engine Memory Corruption RCE in Microsoft Edge

IdentifiersCVE-2018-8617CWE-119