Zero-day Vulnerability Database

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Zero-day vulnerabilities discovered: 1

Denial of service in ISC BIND
CVE-2013-4854

Denial of service

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

The weakness exists due to an error in the RFC 5011 implementation in rdata.c when parsing RDATA within a DNS query. By using a query with a malformed RDATA section that is not properly handled during construction of a log message, a remote attacker can cause an assertion failure and named daemon exit.

Successful exploitation of the vulnerability results in denial of service on the vulnerable system.

Note: the vulnerability was being actively exploited.
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We are aware of in the wild exploitation of this vulnerability before official patch release.
This vulnerability was discovered by Maxim Shudrak.

Software: ISC BIND

We are aware of in the wild exploitation of this vulnerability before official patch release.
This vulnerability was discovered by Maxim Shudrak.

Links:

https://kb.isc.org/article/AA-01015

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About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.