SB2018061204 - Multiple vulnerabilities in Asterisk

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Infinite loop (CVE-ID: N/A)

The vulnerability allows a remote authenticated attacker to cause DoS condition on the target system.

The vulnerability exists due to an error when processing malicious input. A remote attacker can send specially crafted data via TCP/TLS or abruptly disconnect to trigger an iostream read error and cause the target service to enter an infinite loop and become unusable.

2) Information disclosure (CVE-ID: N/A)

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

The vulnerability exists due to an error when the system is configured with endpoint-specific access control list (ACL) rules. A remote attacker can send a SIP request to cause the system to return a 403 Forbidden response and disclose the existence of the PJSIP endpoint.

Remediation

Install update from vendor's website.

References

• http://downloads.asterisk.org/pub/security/AST-2018-007.html
• http://downloads.asterisk.org/pub/security/AST-2018-008.html