Ubuntu: Security Advisory (USN-612-2)

# SPDX-FileCopyrightText: 2009 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("1.3.6.1.4.1.25623.1.0.840271");
  script_cve_id("CVE-2008-0166");
  script_tag(name:"creation_date", value:"2009-03-23 09:59:50 +0000 (Mon, 23 Mar 2009)");
  script_version("2024-02-09T05:06:25+0000");
  script_tag(name:"last_modification", value:"2024-02-09 05:06:25 +0000 (Fri, 09 Feb 2024)");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2024-02-09 02:45:16 +0000 (Fri, 09 Feb 2024)");

  script_name("Ubuntu: Security Advisory (USN-612-2)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2009 Greenbone AG");
  script_family("Ubuntu Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/ubuntu_linux", "ssh/login/packages", re:"ssh/login/release=UBUNTU(7\.04|7\.10|8\.04\ LTS)");

  script_xref(name:"Advisory-ID", value:"USN-612-2");
  script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-612-2");
  script_xref(name:"URL", value:"http://www.ubuntu.com/usn/usn-612-1");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'openssh' package(s) announced via the USN-612-2 advisory.");

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

  script_tag(name:"insight", value:"A weakness has been discovered in the random number generator used
by OpenSSL on Debian and Ubuntu systems. As a result of this
weakness, certain encryption keys are much more common than they
should be, such that an attacker could guess the key through a
brute-force attack given minimal knowledge of the system. This
particularly affects the use of encryption keys in OpenSSH.

This vulnerability only affects operating systems which (like
Ubuntu) are based on Debian. However, other systems can be
indirectly affected if weak keys are imported into them.

We consider this an extremely serious vulnerability, and urge all
users to act immediately to secure their systems.");

  script_tag(name:"affected", value:"'openssh' package(s) on Ubuntu 7.04, Ubuntu 7.10, Ubuntu 8.04.");

  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 == "UBUNTU7.04") {

  if(!isnull(res = isdpkgvuln(pkg:"openssh-client", ver:"1:4.3p2-8ubuntu1.3", rls:"UBUNTU7.04"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"openssh-server", ver:"1:4.3p2-8ubuntu1.3", rls:"UBUNTU7.04"))) {
    report += res;
  }

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

if(release == "UBUNTU7.10") {

  if(!isnull(res = isdpkgvuln(pkg:"openssh-client", ver:"1:4.6p1-5ubuntu0.3", rls:"UBUNTU7.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"openssh-server", ver:"1:4.6p1-5ubuntu0.3", rls:"UBUNTU7.10"))) {
    report += res;
  }

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

if(release == "UBUNTU8.04 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"openssh-client", ver:"1:4.7p1-8ubuntu1.1", rls:"UBUNTU8.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"openssh-server", ver:"1:4.7p1-8ubuntu1.1", rls:"UBUNTU8.04 LTS"))) {
    report += res;
  }

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

exit(0);