The following updates are available for Debian GNU/Linux:

[DLA 614-1] xen security update
[DLA 616-1] curl security update
[DSA 3664-1] pdns security update

[DLA 614-1] xen security update

Package : xen
Version : 4.1.6.lts1-2
CVE ID : CVE-2016-7092 CVE-2016-7094

Multiple vulnerabilities have been discovered in the Xen hypervisor. The
Common Vulnerabilities and Exposures project identifies the following
problems:

CVE-2016-7092 (XSA-185)

Jeremie Boutoille of Quarkslab and Shangcong Luan of Alibaba
discovered a flaw in the handling of L3 pagetable entries, allowing
a malicious 32-bit PV guest administrator can escalate their
privilege to that of the host.

CVE-2016-7094 (XSA-187)

x86 HVM guests running with shadow paging use a subset of the x86
emulator to handle the guest writing to its own pagetables. Andrew
Cooper of Citrix discovered that there are situations a guest can
provoke which result in exceeding the space allocated for internal
state. A malicious HVM guest administrator can cause Xen to fail a
bug check, causing a denial of service to the host.

For Debian 7 "Wheezy", these problems have been fixed in version
4.1.6.lts1-2. For Debian 8 "Jessie", these problems have been fixed in
version 4.4.1-9+deb8u7.

We recommend that you upgrade your xen packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

[DLA 616-1] curl security update

Package : curl
Version : 7.26.0-1+wheezy15
CVE ID : CVE-2016-7141
Debian Bug : 836918

It was discovered that libcurl built on top of NSS (Network Security
Services) incorrectly re-used client certificates if a certificate from
file was used for one TLS connection but no certificate set for a
subsequent TLS connection.

For Debian 7 "Wheezy", this problem has been fixed in version
7.26.0-1+wheezy15.

We recommend that you upgrade your curl packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

[DSA 3664-1] pdns security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-3664-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
September 10, 2016 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : pdns
CVE ID : CVE-2016-5426 CVE-2016-5427 CVE-2016-6172
Debian Bug : 830808

Multiple vulnerabilities have been discovered in pdns, an authoritative
DNS server. The Common Vulnerabilities and Exposures project identifies
the following problems:

CVE-2016-5426 / CVE-2016-5427

Florian Heinz and Martin Kluge reported that the PowerDNS
Authoritative Server accepts queries with a qname's length larger
than 255 bytes and does not properly handle dot inside labels. A
remote, unauthenticated attacker can take advantage of these flaws
to cause abnormal load on the PowerDNS backend by sending specially
crafted DNS queries, potentially leading to a denial of service.

CVE-2016-6172

It was reported that a malicious primary DNS server can crash a
secondary PowerDNS server due to improper restriction of zone size
limits. This update adds a feature to limit AXFR sizes in response
to this flaw.

For the stable distribution (jessie), these problems have been fixed in
version 3.4.1-4+deb8u6.

We recommend that you upgrade your pdns packages.

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/