Debian: Security Advisory (DSA-4694-1)

# SPDX-FileCopyrightText: 2020 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.704694");
  script_cve_id("CVE-2020-12662", "CVE-2020-12663");
  script_tag(name:"creation_date", value:"2020-05-28 03:00:07 +0000 (Thu, 28 May 2020)");
  script_version("2024-02-02T05:06:07+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:07 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-05-20 13:42:44 +0000 (Wed, 20 May 2020)");

  script_name("Debian: Security Advisory (DSA-4694-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2020 Greenbone AG");
  script_family("Debian Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/debian_linux", "ssh/login/packages", re:"ssh/login/release=DEB10");

  script_xref(name:"Advisory-ID", value:"DSA-4694-1");
  script_xref(name:"URL", value:"https://www.debian.org/security/2020/DSA-4694-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-4694");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/unbound");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'unbound' package(s) announced via the DSA-4694-1 advisory.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");

  script_tag(name:"insight", value:"Two vulnerabiliites have been discovered in Unbound, a recursive-only caching DNS server, a traffic amplification attack against third party authoritative name servers (NXNSAttack) and insufficient sanitisation of replies from upstream servers could result in denial of service via an infinite loop.

The version of Unbound in the oldstable distribution (stretch) is no longer supported. If these security issues affect your setup, you should upgrade to the stable distribution (buster).

For the stable distribution (buster), these problems have been fixed in version 1.9.0-2+deb10u2.

We recommend that you upgrade your unbound packages.

For the detailed security status of unbound please refer to its security tracker page at: [link moved to references]");

  script_tag(name:"affected", value:"'unbound' package(s) on Debian 10.");

  script_tag(name:"solution", value:"Please install the updated package(s).");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"package");

  exit(0);
}

include("revisions-lib.inc");
include("pkg-lib-deb.inc");

release = dpkg_get_ssh_release();
if(!release)
  exit(0);

res = "";
report = "";

if(release == "DEB10") {

  if(!isnull(res = isdpkgvuln(pkg:"libunbound-dev", ver:"1.9.0-2+deb10u2", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libunbound8", ver:"1.9.0-2+deb10u2", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"python-unbound", ver:"1.9.0-2+deb10u2", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"python3-unbound", ver:"1.9.0-2+deb10u2", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"unbound", ver:"1.9.0-2+deb10u2", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"unbound-anchor", ver:"1.9.0-2+deb10u2", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"unbound-host", ver:"1.9.0-2+deb10u2", rls:"DEB10"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if(__pkg_match) {
    exit(99);
  }
  exit(0);
}

exit(0);