Debian: Security Advisory (DSA-4711-1)

# 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("1.3.6.1.4.1.25623.1.0.704711");
  script_cve_id("CVE-2020-4067", "CVE-2020-6061", "CVE-2020-6062");
  script_tag(name:"creation_date", value:"2020-06-30 03:00:16 +0000 (Tue, 30 Jun 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:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-02-24 16:45:00 +0000 (Mon, 24 Feb 2020)");

  script_name("Debian: Security Advisory (DSA-4711-1)");
  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-4711-1");
  script_xref(name:"URL", value:"https://www.debian.org/security/2020/DSA-4711-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-4711");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/coturn");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'coturn' package(s) announced via the DSA-4711-1 advisory.");

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

  script_tag(name:"insight", value:"Several vulnerabilities were discovered in coturn, a TURN and STUN server for VoIP.

CVE-2020-4067

Felix Doerre reported that the STUN response buffer was not properly initialised, which could allow an attacker to leak bytes in the padding bytes from the connection of another client.

CVE-2020-6061

Aleksandar Nikolic reported that a crafted HTTP POST request can lead to information leaks and other misbehavior.

CVE-2020-6062

Aleksandar Nikolic reported that a crafted HTTP POST request can lead to server crash and denial of service.

For the oldstable distribution (stretch), these problems have been fixed in version 4.5.0.5-1+deb9u2.

For the stable distribution (buster), these problems have been fixed in version 4.5.1.1-1.1+deb10u1.

We recommend that you upgrade your coturn packages.

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

  script_tag(name:"affected", value:"'coturn' 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:"coturn", ver:"4.5.1.1-1.1+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:"coturn", ver:"4.5.0.5-1+deb9u2", rls:"DEB9"))) {
    report += res;
  }

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

exit(0);