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openvasCopyright (C) 2015 Greenbone Networks GmbHOPENVAS:1361412562310120615
HistoryDec 15, 2015 - 12:00 a.m.

Amazon Linux: Security Advisory (ALAS-2015-625)

2015-12-1500:00:00
Copyright (C) 2015 Greenbone Networks GmbH
plugins.openvas.org
14

6.7 Medium

AI Score

Confidence

Low

8.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:P/I:N/A:C

0.164 Low

EPSS

Percentile

95.9%

The remote host is missing an update for the

# Copyright (C) 2015 Greenbone Networks GmbH
# 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-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.120615");
  script_cve_id("CVE-2015-5600", "CVE-2015-6563", "CVE-2015-6564");
  script_tag(name:"creation_date", value:"2015-12-15 00:51:26 +0000 (Tue, 15 Dec 2015)");
  script_version("2022-01-07T14:23:04+0000");
  script_tag(name:"last_modification", value:"2022-01-07 14:23:04 +0000 (Fri, 07 Jan 2022)");
  script_tag(name:"cvss_base", value:"8.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:C");

  script_name("Amazon Linux: Security Advisory (ALAS-2015-625)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2015 Greenbone Networks GmbH");
  script_family("Amazon Linux Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/amazon_linux", "ssh/login/release");

  script_xref(name:"Advisory-ID", value:"ALAS-2015-625");
  script_xref(name:"URL", value:"https://alas.aws.amazon.com/ALAS-2015-625.html");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'openssh' package(s) announced via the ALAS-2015-625 advisory.");

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

  script_tag(name:"insight", value:"A flaw was found in the way OpenSSH handled PAM authentication when using privilege separation. An attacker with valid credentials on the system and able to fully compromise a non-privileged pre-authentication process using a different flaw could use this flaw to authenticate as other users.

It was discovered that the OpenSSH sshd daemon did not check the list of keyboard-interactive authentication methods for duplicates. A remote attacker could use this flaw to bypass the MaxAuthTries limit, making it easier to perform password guessing attacks.

A use-after-free flaw was found in OpenSSH. An attacker able to fully compromise a non-privileged pre-authentication process using a different flaw could possibly cause sshd to crash or execute arbitrary code with root privileges.");

  script_tag(name:"affected", value:"'openssh' package(s) on Amazon Linux.");

  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-rpm.inc");

release = rpm_get_ssh_release();
if(!release)
  exit(0);

res = "";
report = "";

if(release == "AMAZON") {

  if(!isnull(res = isrpmvuln(pkg:"openssh", rpm:"openssh~6.6.1p1~22.58.amzn1", rls:"AMAZON"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"openssh-clients", rpm:"openssh-clients~6.6.1p1~22.58.amzn1", rls:"AMAZON"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"openssh-debuginfo", rpm:"openssh-debuginfo~6.6.1p1~22.58.amzn1", rls:"AMAZON"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"openssh-keycat", rpm:"openssh-keycat~6.6.1p1~22.58.amzn1", rls:"AMAZON"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"openssh-ldap", rpm:"openssh-ldap~6.6.1p1~22.58.amzn1", rls:"AMAZON"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"openssh-server", rpm:"openssh-server~6.6.1p1~22.58.amzn1", rls:"AMAZON"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"pam_ssh_agent_auth", rpm:"pam_ssh_agent_auth~0.9.3~9.22.58.amzn1", rls:"AMAZON"))) {
    report += res;
  }

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

exit(0);

6.7 Medium

AI Score

Confidence

Low

8.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:P/I:N/A:C

0.164 Low

EPSS

Percentile

95.9%