Test ID:	1.3.6.1.4.1.25623.1.0.892556
Category:	Debian Local Security Checks
Title:	Debian: Security Advisory (DLA-2556-1)
Summary:	The remote host is missing an update for the Debian 'unbound1.9' package(s) announced via the DLA-2556-1 advisory.
Description:	Summary: The remote host is missing an update for the Debian 'unbound1.9' package(s) announced via the DLA-2556-1 advisory. Vulnerability Insight: Several security vulnerabilities have been corrected in unbound, a validating, recursive, caching DNS resolver. Support for the unbound DNS server has been resumed, the sources can be found in the unbound1.9 source package. CVE-2020-12662 Unbound has Insufficient Control of Network Message Volume, aka an NXNSAttack issue. This is triggered by random subdomains in the NSDNAME in NS records. CVE-2020-12663 Unbound has an infinite loop via malformed DNS answers received from upstream servers. CVE-2020-28935 Unbound contains a local vulnerability that would allow for a local symlink attack. When writing the PID file Unbound creates the file if it is not there, or opens an existing file for writing. In case the file was already present, it would follow symlinks if the file happened to be a symlink instead of a regular file. For Debian 9 stretch, these problems have been fixed in version 1.9.0-2+deb10u2~ deb9u1. We recommend that you upgrade your unbound1.9 packages. For the detailed security status of unbound1.9 please refer to its security tracker page at: [link moved to references] Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: [link moved to references] Affected Software/OS: 'unbound1.9' package(s) on Debian 9. Solution: Please install the updated package(s). CVSS Score: 5.0 CVSS Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2020-12662 Debian Security Information: DSA-4694 (Google Search) https://www.debian.org/security/2020/dsa-4694 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F5NFROI2OMCZLYRTCNGHGO3TUD32LCIQ/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YJ42N2HBZ3DXMSEC56SWIIOFQGOS5M7I/ FreeBSD Security Advisory: FreeBSD-SA-20:19 https://security.FreeBSD.org/advisories/FreeBSD-SA-20:19.unbound.asc http://www.nxnsattack.com https://lists.debian.org/debian-lts-announce/2021/02/msg00017.html http://www.openwall.com/lists/oss-security/2020/05/19/5 SuSE Security Announcement: openSUSE-SU-2020:0912 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.html SuSE Security Announcement: openSUSE-SU-2020:0913 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.html https://usn.ubuntu.com/4374-1/ Common Vulnerability Exposure (CVE) ID: CVE-2020-12663 Common Vulnerability Exposure (CVE) ID: CVE-2020-28935 https://www.nlnetlabs.nl/downloads/nsd/CVE-2020-28935.txt https://www.nlnetlabs.nl/downloads/unbound/CVE-2020-28935.txt https://security.gentoo.org/glsa/202101-38 https://lists.debian.org/debian-lts-announce/2023/03/msg00024.html
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