REDHAT-BUG-2463539: Medium severity GNU GNU C Library (glibc) vulnerability
The deprecated functions nsprintrrf, nsprintrr and fpnquery in the GNU C Library version 2.2 and newer fail to validate the RDATA content against the RDATA length in a DNS response when processing LOC, CERT, TKEY or TSIG records, which may allow an attacker to craft a DNS response, causing a target application to crash or read uninitialized memory.
These functions are for application debugging only and hence not in the path of code executed by the DNS resolver. Further, they have been deprecated since version 2.34 and should not be used by any new applications. Applications should consider porting away from these interfaces since they may be removed in future versions.
Affected Software
Event History
Frequently Asked Questions
What is the severity of REDHAT-BUG-2463539?
The severity of REDHAT-BUG-2463539 is medium with a risk level of 4.
How do I fix REDHAT-BUG-2463539?
To fix REDHAT-BUG-2463539, update the GNU C Library to a version that removes the use of the deprecated functions.
What vulnerabilities are associated with REDHAT-BUG-2463539?
REDHAT-BUG-2463539 is associated with vulnerabilities in handling LOC, CERT, TKEY, and TSIG records in DNS responses.
What impact does REDHAT-BUG-2463539 have?
REDHAT-BUG-2463539 may allow an attacker to craft a malicious DNS response that could exploit the defined deprecated functions.
Which software is affected by REDHAT-BUG-2463539?
The affected software for REDHAT-BUG-2463539 is the GNU C Library (glibc) version 2.2 and newer.