Patchfirst
CVE-2020-0878 KEVRansomware Medium · 4.2 EPSS 2.7%

Microsoft Edge and Internet Explorer Memory Corruption Vulnerability

Microsoft · Edge and Internet Explorer

Summary

A memory corruption flaw in the way Microsoft Edge and Internet Explorer access objects in memory allows remote code execution. An attacker can exploit it over the network with no authentication, but only by getting a user to visit a specially crafted or compromised website, or open a malicious attachment or link, which then runs arbitrary code with the current user's rights.

Official description · NVD

<p>A remote code execution vulnerability exists in the way that Microsoft browsers access objects in memory. The vulnerability could corrupt memory in a way that could allow an attacker to execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, the attacker could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.</p> <p>An attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft browsers, and then convince a user to view the website. The attacker could also take advantage of compromised websites, or websites that accept or host user-provided content or advertisements, by adding specially crafted content that could exploit the vulnerability. In all cases, however, an attacker would have no way to force users to view the attacker-controlled content. Instead, an attacker would have to convince users to take action, typically via an enticement in email or instant message, or by getting them to open an email attachment.</p> <p>The security update addresses the vulnerability by modifying how Microsoft browsers handle objects in memory.</p>

Breakdown
68.1 / 100
Exploited
Yes, in CISA KEV
Reports
0
Tactics
2/15

How an attack unfolds

Based on mappings. Select a step to see the evidence.
  1. How attackers get in

  2. What they do

First seen exploited 14 months after disclosure.

  1. Disclosedday 0
  2. First seen exploitedVulnCheck KEV evidenceAdded to CISA KEVknown ransomware use; EU database agrees+14 mo

CISA KEV listing is when exploitation was confirmed, not necessarily the first attack.

techniques

2 , grouped by in kill-chain order, 2 cited passages 2

Initial AccessTA0001

Drive-by Compromise T1189 Medium
AI mapping from the description · how it is exploited

Malicious website drives browser exploitation

An attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft browsers
From the official description (NVD) Original (opens in a new tab) ↗

ExecutionTA0002

Command and Scripting Interpreter T1059 Medium
AI mapping from the description · primary impact

Arbitrary code execution as current user

could allow an attacker to execute arbitrary code in the context of the current user
From the official description (NVD) Original (opens in a new tab) ↗

Detection

0 rules for this CVE · 98 general rules for its techniques

Rules for this CVE

0 that reference CVE-2020-0878 directly.

CVE-specific rules are not available in this build. Search SigmaHQ ↗

General rules for this CVE’s techniques

These detect the technique in general, not this specific vulnerability.

Sigma rules © SigmaHQ, Detection Rule License 1.1; linked, not reproduced.

What security researchers reported

Not named in any threat report yet

Also mentioned in 50 community threat pulses (AlienVault OTX)

Weaker evidence

Pulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.

References

2 links, grouped by NVD tag (1 duplicate merged)
↑ ↓ chooseEnter openEsc close