-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

- -------------------------------------------------------------------------
Debian Security Advisory DSA-4689-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
May 19, 2020                          https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package        : bind9
CVE ID         : CVE-2019-6477 CVE-2020-8616 CVE-2020-8617
Debian Bug     : 945171

Several vulnerabilities were discovered in BIND, a DNS server
implementation.

CVE-2019-6477

    It was discovered that TCP-pipelined queries can bypass tcp-client
    limits resulting in denial of service.

CVE-2020-8616

    It was discovered that BIND does not sufficiently limit the number
    of fetches performed when processing referrals. An attacker can take
    advantage of this flaw to cause a denial of service (performance
    degradation) or use the recursing server in a reflection attack with
    a high amplification factor.

CVE-2020-8617

    It was discovered that a logic error in the code which checks TSIG
    validity can be used to trigger an assertion failure, resulting in
    denial of service.

For the oldstable distribution (stretch), these problems have been fixed
in version 1:9.10.3.dfsg.P4-12.3+deb9u6.

For the stable distribution (buster), these problems have been fixed in
version 1:9.11.5.P4+dfsg-5.1+deb10u1.

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: debian-security-announce@lists.debian.org
-----BEGIN PGP SIGNATURE-----
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=SqNI
-----END PGP SIGNATURE-----