Debian: Security Advisory (DSA-4601-1)

# 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("1.3.6.1.4.1.25623.1.0.704601");
  script_cve_id("CVE-2019-20373");
  script_tag(name:"creation_date", value:"2020-01-10 14:23:39 +0000 (Fri, 10 Jan 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:"2020-01-24 15:11:18 +0000 (Fri, 24 Jan 2020)");

  script_name("Debian: Security Advisory (DSA-4601-1)");
  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=DEB(10|9)");

  script_xref(name:"Advisory-ID", value:"DSA-4601-1");
  script_xref(name:"URL", value:"https://www.debian.org/security/2020/DSA-4601-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-4601");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/ldm");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'ldm' package(s) announced via the DSA-4601-1 advisory.");

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

  script_tag(name:"insight", value:"It was discovered that a hook script of ldm, the display manager for the Linux Terminal Server Project, incorrectly parsed responses from an SSH server, which could result in local root privilege escalation.

For the oldstable distribution (stretch), this problem has been fixed in version 2:2.2.18-2+deb9u1.

For the stable distribution (buster), this problem has been fixed in version 2:2.18.06-1+deb10u1.

We recommend that you upgrade your ldm packages.

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

  script_tag(name:"affected", value:"'ldm' package(s) on Debian 9, 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:"ldm", ver:"2:2.18.06-1+deb10u1", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"ldm-server", ver:"2:2.18.06-1+deb10u1", rls:"DEB10"))) {
    report += res;
  }

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

if(release == "DEB9") {

  if(!isnull(res = isdpkgvuln(pkg:"ldm", ver:"2:2.2.18-2+deb9u1", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"ldm-server", ver:"2:2.2.18-2+deb9u1", rls:"DEB9"))) {
    report += res;
  }

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

exit(0);