First published: Tue Dec 20 2011(Updated: )
Unbound before 1.4.13p2 attempts to free unallocated memory during processing of duplicate CNAME records in a signed zone, which allows remote DNS servers to cause a denial of service (daemon crash) via a crafted response.
Credit: cret@cert.org
Affected Software | Affected Version | How to fix |
---|---|---|
libunbound | <=1.4.13 | |
libunbound | =0.0 | |
libunbound | =0.1 | |
libunbound | =0.2 | |
libunbound | =0.3 | |
libunbound | =0.4 | |
libunbound | =0.5 | |
libunbound | =0.6 | |
libunbound | =0.7 | |
libunbound | =0.7.1 | |
libunbound | =0.7.2 | |
libunbound | =0.8 | |
libunbound | =0.09 | |
libunbound | =0.10 | |
libunbound | =0.11 | |
libunbound | =1.0.0 | |
libunbound | =1.0.1 | |
libunbound | =1.0.2 | |
libunbound | =1.1.0 | |
libunbound | =1.1.1 | |
libunbound | =1.2.0 | |
libunbound | =1.2.1 | |
libunbound | =1.3.0 | |
libunbound | =1.3.1 | |
libunbound | =1.3.2 | |
libunbound | =1.3.3 | |
libunbound | =1.3.4 | |
libunbound | =1.4.0 | |
libunbound | =1.4.1 | |
libunbound | =1.4.2 | |
libunbound | =1.4.3 | |
libunbound | =1.4.4 | |
libunbound | =1.4.5 | |
libunbound | =1.4.6 | |
libunbound | =1.4.7 | |
libunbound | =1.4.8 | |
libunbound | =1.4.9 | |
libunbound | =1.4.10 | |
libunbound | =1.4.11 | |
libunbound | =1.4.12 | |
libunbound | =1.4.14-rc1 |
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CVE-2011-4528 has a medium severity rating due to its potential to cause a denial of service.
To fix CVE-2011-4528, upgrade to Unbound version 1.4.13p2 or later.
CVE-2011-4528 affects various versions of Unbound including all versions prior to 1.4.13p2.
Yes, CVE-2011-4528 allows remote DNS servers to exploit the vulnerability and potentially crash the daemon.
Yes, CVE-2011-4528 is caused by Unbound attempting to free unallocated memory during the processing of duplicate CNAME records.