SB2017041821 - Fedora 24 update for bind99

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Assertion failure (CVE-ID: CVE-2017-3136)

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

The vulnerability exists due to the servers are configured to use DNS64 and if the option "break-dnssec yes;" is in use. A remote attacker can supply specially crafted queries, if it was configured to use the DNS64 feature and other preconditions were met, trigger a server using DNS64 assertion failure and cause the service to crash.

2) Assertion failure (CVE-ID: CVE-2017-3137)

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

The vulnerability exists due to improper input validation when processing query response containing CNAME or DNAME resource records in an unusual order in BIND. A remote attacker can trigger assertion failure and crash BIND application.

3) Assertion failure (CVE-ID: CVE-2017-3138)

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

The vulnerability exists due to named contains a feature which allows operators to issue commands to a running server by communicating with the server process over a control channel, using a utility program such as rndc.. A remote attacker can send some versions of named a null command string, trigger a REQUIRE assertion failure and cause the service to crash.

Remediation

Install update from vendor's website.

References

• https://bodhi.fedoraproject.org/updates/FEDORA-2017-edce28f24b