Ubuntu: Security Advisory (USN-612-5)

# 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("1.3.6.1.4.1.25623.1.0.840300");
  script_cve_id("CVE-2008-2285");
  script_tag(name:"creation_date", value:"2009-03-23 09:59:50 +0000 (Mon, 23 Mar 2009)");
  script_version("2024-10-23T05:05:58+0000");
  script_tag(name:"last_modification", value:"2024-10-23 05:05:58 +0000 (Wed, 23 Oct 2024)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");

  script_name("Ubuntu: Security Advisory (USN-612-5)");
  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-612-5");
  script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-612-5");
  script_xref(name:"URL", value:"http://www.ubuntu.com/usn/usn-612-2");
  script_xref(name:"URL", value:"https://launchpad.net/bugs/230029");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'openssh' package(s) announced via the USN-612-5 advisory.");

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

  script_tag(name:"insight", value:"Matt Zimmerman discovered that entries in ~/.ssh/authorized_keys
with options (such as 'no-port-forwarding' or forced commands) were
ignored by the new ssh-vulnkey tool introduced in OpenSSH (see
USN-612-2). This could cause some compromised keys not to be
listed in ssh-vulnkey's output.

This update also adds more information to ssh-vulnkey's manual page.

Original advisory details:

 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, OpenVPN
 and SSL certificates.");

  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:"1:4.3p2-8ubuntu1.4", rls:"UBUNTU7.04"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"openssh-client-udeb", ver:"1:4.3p2-8ubuntu1.4", 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:"1:4.6p1-5ubuntu0.5", rls:"UBUNTU7.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"openssh-client-udeb", ver:"1:4.6p1-5ubuntu0.5", 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:"1:4.7p1-8ubuntu1.2", rls:"UBUNTU8.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"openssh-client-udeb", ver:"1:4.7p1-8ubuntu1.2", rls:"UBUNTU8.04 LTS"))) {
    report += res;
  }

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

exit(0);