SB2018081411 - Multiple vulnerabilities in Microsoft Exchange

Description

This security bulletin contains information about 2 vulnerabilities.

1) Buffer overflow (CVE-ID: CVE-2018-8302)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to boundary error when processing email messages within Microsoft Exchange server. A remote unauthenticated attacker can send a specially crafted email, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) Improper access control (CVE-ID: CVE-2018-8374)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to change profile data of other Exchange users.

The vulnerability exists due to an error when processing data profiles. a remote authenticated attacker can change profile data of another Exchange user.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8302
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8374