[SECURITY] [DSA 4909-1] bind9 security update
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Debian Security Advisory DSA-4909-1 [email protected]
https://www.debian.org/security/ Salvatore Bonaccorso
May 01, 2021 https://www.debian.org/security/faq
- ------------------------------------------------------------------------- Package : bind9
CVE ID : CVE-2021-25214 CVE-2021-25215 CVE-2021-25216
Debian Bug : 987741 987742 987743 Several vulnerabilities were discovered in BIND, a DNS server
implementation. CVE-2021-25214 Greg Kuechle discovered that a malformed incoming IXFR transfer could trigger an assertion failure in named, resulting in denial of service. CVE-2021-25215 Siva Kakarla discovered that named could crash when a DNAME record placed in the ANSWER section during DNAME chasing turned out to be the final answer to a client query. CVE-2021-25216 It was discovered that the SPNEGO implementation used by BIND is prone to a buffer overflow vulnerability. This update switches to use the SPNEGO implementation from the Kerberos libraries. For the stable distribution (buster), these problems have been fixed in
version 1:9.11.5.P4+dfsg-5.1+deb10u5. We recommend that you upgrade your bind9 packages. For the detailed security status of bind9 please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/bind9 Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/ Mailing list: [email protected]
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