Linux Security
Linux Security
Linux Security

Debian: DSA-4909-1: bind9 security update

Date 01 May 2021
364
Posted By LinuxSecurity Advisories
Several vulnerabilities were discovered in BIND, a DNS server implementation. CVE-2021-25214

- -------------------------------------------------------------------------
Debian Security Advisory DSA-4909-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
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: This email address is being protected from spambots. You need JavaScript enabled to view it.

Advisories

LinuxSecurity Poll

How frequently do you patch/update your system?

No answer selected. Please try again.
Please select either existing option or enter your own, however not both.
Please select minimum 0 answer(s) and maximum 3 answer(s).
/main-polls/52-how-frequently-do-you-patch-update-your-system?task=poll.vote&format=json
52
radio
[{"id":"179","title":"As soon as patches\/updates are released - I track advisories for my distro(s) diligently","votes":"66","type":"x","order":"1","pct":75.86,"resources":[]},{"id":"180","title":"Every so often, when I think of it","votes":"14","type":"x","order":"2","pct":16.09,"resources":[]},{"id":"181","title":"Hardly ever","votes":"7","type":"x","order":"3","pct":8.05,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350

Please vote first in order to view vote results.

VOTE ON THE POLL PAGE


VIEW MORE POLLS

bottom 200

Please enable / Bitte aktiviere JavaScript!
Veuillez activer / Por favor activa el Javascript![ ? ]

We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.