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symantecSymantec Security ResponseSMNTC-102081
HistoryDec 12, 2017 - 12:00 a.m.

Microsoft Edge Scripting Engine CVE-2017-11893 Remote Memory Corruption Vulnerability

2017-12-1200:00:00
Symantec Security Response
www.symantec.com
21
microsoft edge
remote memory corruption
arbitrary code execution
denial of service
chakracore
network intrusion detection
minimal access rights
malicious activity monitoring
untrusted links
memory-protection schemes
software updates

EPSS

0.9

Percentile

98.9%

Description

Microsoft Edge is prone to a remote memory-corruption vulnerability. Attackers can exploit this issue to execute arbitrary code in the context of the currently logged-in user. Failed attacks will cause denial of service conditions.

Technologies Affected

  • Microsoft ChakraCore
  • Microsoft Edge

Recommendations

Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits

Do not follow links provided by unknown or untrusted sources.
Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.

Implement multiple redundant layers of security.
Memory-protection schemes (such as nonexecutable stack and heap configurations and randomly mapped memory segments) will complicate exploits of memory-corruption vulnerabilities.

Updates are available. Please see the references or vendor advisory for more information.