CVE-2020-5830: 
Symantec Endpoint Management vulnerability analysis and mitigation

Symantec Endpoint Protection Manager (SEPM), prior to version 14.2 RU2 MP1, was found to contain an out-of-bounds vulnerability (CVE-2020-5830). This vulnerability was discovered and reported by KPC working with Trend Micro Zero Day Initiative, and was publicly disclosed on February 11, 2020. The vulnerability affects the secars.dll module of SEPM installations (ZDI Advisory).

The vulnerability is classified as a low severity issue with a CVSS v3 score of 3.3 (AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N). The specific flaw exists within the secars.dll module and results from the lack of proper validation of user-supplied data, which can lead to a read past the end of an allocated buffer. This out-of-bounds vulnerability allows an application to read memory outside of the bounds of the memory that had been allocated to the program (Broadcom Support).

The vulnerability allows local attackers to disclose sensitive information on affected installations of Symantec Endpoint Protection Manager. An attacker must first obtain the ability to execute low-privileged code on the target system to exploit this vulnerability. The attacker can potentially leverage this in conjunction with other vulnerabilities to execute code in the context of the semwebsrv user (ZDI Advisory).

Symantec has released updates to address this vulnerability. Users should upgrade to SEPM version 14.2 RU2 MP1 or later. Additionally, Symantec recommends restricting access to administrative or management systems to authorized privileged users, running under the principle of least privilege, keeping all operating systems and applications current with vendor patches, and following a multi-layered approach to security (Broadcom Support).