SB2018122707 - Denial of service in F5 BIG-IP

Description

This security bulletin contains information about 2 vulnerabilities.

1) Denial of service (CVE-ID: CVE-2018-15335)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

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

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to APM becomes a client application to an external OAuth authorization server when APM is deployed as an OAuth Resource Server. A remote attacker can cause APM not to display the intended message in the failure response when communication between the BIG-IP APM and the OAuth authorization server is lost.

2) Input validation error (CVE-ID: CVE-2018-17539)

CWE-ID: CWE-20 - Improper input validation

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

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists in BGP daemon (bgpd) due to insufficient validation of user-supplied input. A remote attacker can perform a denial of service attack via an autonomous system (AS) path containing 8 or more autonomous system number (ASN) elements.

Remediation

Install update from vendor's website.

References

• https://support.f5.com/csp/article/K27617652
• https://support.f5.com/csp/article/K17264695