Debian: Security Advisory (DSA-4737-1)

# 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("1.3.6.1.4.1.25623.1.0.704737");
  script_cve_id("CVE-2020-4044");
  script_tag(name:"creation_date", value:"2020-07-31 03:00:04 +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:"4.6");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:P/I:P/A:P");
  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:"2020-07-13 00:26:52 +0000 (Mon, 13 Jul 2020)");

  script_name("Debian: Security Advisory (DSA-4737-1)");
  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-4737-1");
  script_xref(name:"URL", value:"https://www.debian.org/security/2020/DSA-4737-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-4737");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/xrdp");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'xrdp' package(s) announced via the DSA-4737-1 advisory.");

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

  script_tag(name:"insight", value:"Ashley Newson discovered that the XRDP sessions manager was susceptible to denial of service. A local attacker can further take advantage of this flaw to impersonate the XRDP sessions manager and capture any user credentials that are submitted to XRDP, approve or reject arbitrary login credentials or to hijack existing sessions for xorgxrdp sessions.

For the stable distribution (buster), this problem has been fixed in version 0.9.9-1+deb10u1.

We recommend that you upgrade your xrdp packages.

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

  script_tag(name:"affected", value:"'xrdp' 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:"xrdp", ver:"0.9.9-1+deb10u1", rls:"DEB10"))) {
    report += res;
  }

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

exit(0);