SB2018081422 - Microsoft Windows update for Adobe Flash

Description

This security bulletin contains information about 5 vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2018-12824)

CWE-ID: CWE-125 - Out-of-bounds read

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

The vulnerability allows a remote attacker to obtain potentially sensitive information.

The vulnerability exists due to out-of-bounds read when handling malicious input. A remote attacker can trick the victim into opening a specially crafted .swf and gain access to potentially sensitive information.

2) Security restrictions bypass (CVE-ID: CVE-2018-12825)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

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

The vulnerability allows a remote attacker to obtain potentially sensitive information.

The vulnerability exists due to security restrictions bypass. A remote attacker can trick the victim into opening a specially crafted .swf file, bypass security restrictions and gain access to potentially sensitive information.

3) Out-of-bounds read (CVE-ID: CVE-2018-12826)

CWE-ID: CWE-125 - Out-of-bounds read

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

The vulnerability allows a remote attacker to obtain potentially sensitive information.

The vulnerability exists due to out-of-bounds read when handling malicious input. A remote attacker can trick the victim into opening a specially crafted .swf and gain access to potentially sensitive information.

4) Out-of-bounds read (CVE-ID: CVE-2018-12827)

CWE-ID: CWE-125 - Out-of-bounds read

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

The vulnerability allows a remote attacker to obtain potentially sensitive information.

The vulnerability exists due to out-of-bounds read when handling malicious input. A remote attacker can trick the victim into opening a specially crafted .swf and gain access to potentially sensitive information.

5) Improper input validation (CVE-ID: CVE-2018-12828)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/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 an error when handling malicious input. A remote attacker can trick the victim into opening a specially crafted .swf file and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV180020