Norton Remove & Reinstall can be susceptible to a DLL preloading vulnerability. These types of issues occur when an application looks to call a DLL for execution and an attacker provides a malicious DLL to use instead. Depending on how the application is configured, it will generally follow a specific search path to locate the DLL. The vulnerability can be exploited by a simple file write (or potentially an over-write) which results in a foreign DLL running under the context of the application.
This issue was validated by the product team engineers. A Norton Remove & Reinstall update, version 126.96.36.199, has been released which addresses the aforementioned vulnerability. Note that Norton Remove & Reinstall’s latest release and patches are available to customers through normal support channels or can be downloaded directly from the following URL:
To determine if your version of Norton Remove & Reinstall is susceptible to this vulnerability, please perform the following actions:
Open the File properties for NRnR.exe, click on the ‘Details’ tab
View the ‘File Version’ entry
Upgrade to the patched version as needed depending on existing file version (note that file versions older than 188.8.131.52 are susceptible to this vulnerability)
At this time, Symantec is not aware of any exploitations or adverse customer impact from these issues.
Symantec recommends the following measures to reduce risk of attack:
Restrict access to administrative or management systems to authorized privileged users.
Restrict remote access to trusted/authorized systems only.
Run under the principle of least privilege, where possible, to limit the impact of potential exploit.
Keep all operating systems and applications current with vendor patches.
Follow a multi-layered approach to security. At a minimum, run both firewall and anti-malware applications to provide multiple points of detection and protection for both inbound and outbound threats.
Deploy network and host-based intrusion detection systems to monitor network traffic for signs of anomalous or suspicious activity. This may aid in the detection of attacks or malicious activity related to the exploitation of latent vulnerabilities.
Kushal Arvind Shah of Fortinet's FortiGuard Labs: firstname.lastname@example.org (CVE-2017-13676)
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