Debian: Security Advisory (DLA-2299-1)

# 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("1.3.6.1.4.1.25623.1.0.892299");
  script_cve_id("CVE-2020-15862");
  script_tag(name:"creation_date", value:"2020-07-31 03:00:10 +0000 (Fri, 31 Jul 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:"7.2");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-08-26 01:36:28 +0000 (Wed, 26 Aug 2020)");

  script_name("Debian: Security Advisory (DLA-2299-1)");
  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=DEB9");

  script_xref(name:"Advisory-ID", value:"DLA-2299-1");
  script_xref(name:"URL", value:"https://www.debian.org/lts/security/2020/DLA-2299-1");
  script_xref(name:"URL", value:"https://wiki.debian.org/LTS");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'net-snmp' package(s) announced via the DLA-2299-1 advisory.");

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

  script_tag(name:"insight", value:"A privilege escalation vulnerability was discovered in Net-SNMP, a set of tools for collecting and organising information about devices on computer networks.

Upstream notes that:

It is still possible to enable this MIB via the --with-mib-modules configure option.

Another MIB that provides similar functionality, namely ucd-snmp/extensible, is disabled by default.

The security risk of ucd-snmp/pass and ucd-snmp/pass_persist is lower since these modules only introduce a security risk if the invoked scripts are exploitable.

For Debian 9 Stretch, these problems have been fixed in version 5.7.3+dfsg-1.7+deb9u2.

We recommend that you upgrade your net-snmp packages.

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]");

  script_tag(name:"affected", value:"'net-snmp' package(s) on Debian 9.");

  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 == "DEB9") {

  if(!isnull(res = isdpkgvuln(pkg:"libsnmp-base", ver:"5.7.3+dfsg-1.7+deb9u2", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsnmp-dev", ver:"5.7.3+dfsg-1.7+deb9u2", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsnmp-perl", ver:"5.7.3+dfsg-1.7+deb9u2", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsnmp30", ver:"5.7.3+dfsg-1.7+deb9u2", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsnmp30-dbg", ver:"5.7.3+dfsg-1.7+deb9u2", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"python-netsnmp", ver:"5.7.3+dfsg-1.7+deb9u2", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"snmp", ver:"5.7.3+dfsg-1.7+deb9u2", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"snmpd", ver:"5.7.3+dfsg-1.7+deb9u2", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"snmptrapd", ver:"5.7.3+dfsg-1.7+deb9u2", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"tkmib", ver:"5.7.3+dfsg-1.7+deb9u2", rls:"DEB9"))) {
    report += res;
  }

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

exit(0);