Mageia: Security Advisory (MGASA-2016-0280)

# SPDX-FileCopyrightText: 2022 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("1.3.6.1.4.1.25623.1.1.10.2016.0280");
  script_cve_id("CVE-2015-8325", "CVE-2016-6210", "CVE-2016-6515");
  script_tag(name:"creation_date", value:"2022-01-28 10:58:44 +0000 (Fri, 28 Jan 2022)");
  script_version("2024-02-02T05:06:09+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:09 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/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:"2016-08-10 13:31:44 +0000 (Wed, 10 Aug 2016)");

  script_name("Mageia: Security Advisory (MGASA-2016-0280)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2022 Greenbone AG");
  script_family("Mageia Linux Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/mageia_linux", "ssh/login/release", re:"ssh/login/release=MAGEIA5");

  script_xref(name:"Advisory-ID", value:"MGASA-2016-0280");
  script_xref(name:"URL", value:"https://advisories.mageia.org/MGASA-2016-0280.html");
  script_xref(name:"URL", value:"https://bugs.mageia.org/show_bug.cgi?id=18222");
  script_xref(name:"URL", value:"https://www.debian.org/security/2016/dsa-3550");
  script_xref(name:"URL", value:"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-6210");
  script_xref(name:"URL", value:"https://lists.fedoraproject.org/archives/list/[email protected]/thread/X2L6RW34VFNXYNVVN2CN73YAGJ5VMTFU/");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'openssh' package(s) announced via the MGASA-2016-0280 advisory.");

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

  script_tag(name:"insight", value:"The do_setup_env function in session.c in sshd in OpenSSH through 7.2p2,
when the UseLogin feature is enabled and PAM is configured to read
.pam_environment files in user home directories, allows local users to
gain privileges by triggering a crafted environment for the /bin/login
program, as demonstrated by an LD_PRELOAD environment variable
(CVE-2015-8325).

When SSHD tries to authenticate a non-existing user, it will pick up a
fake password structure hard-coded in the SSHD source code. An attacker
can measure timing information to determine if a user exists when
verifying a password (CVE-2016-6210).

The auth_password function in auth-passwd.c in sshd in OpenSSH before 7.3
does not limit password lengths for password authentication, which allows
remote attackers to cause a denial of service (crypt CPU consumption) via
a long string (CVE-2016-6515).

Note that CVE-2015-8325 and CVE-2016-6210 wouldn't affect most Mageia
systems, as UseLogin is not enabled by default and Mageia uses Blowfish
password hashes by default.");

  script_tag(name:"affected", value:"'openssh' package(s) on Mageia 5.");

  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 == "MAGEIA5") {

  if(!isnull(res = isrpmvuln(pkg:"openssh", rpm:"openssh~6.6p1~5.9.mga5", rls:"MAGEIA5"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"openssh-askpass", rpm:"openssh-askpass~6.6p1~5.9.mga5", rls:"MAGEIA5"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"openssh-askpass-common", rpm:"openssh-askpass-common~6.6p1~5.9.mga5", rls:"MAGEIA5"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"openssh-askpass-gnome", rpm:"openssh-askpass-gnome~6.6p1~5.9.mga5", rls:"MAGEIA5"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"openssh-clients", rpm:"openssh-clients~6.6p1~5.9.mga5", rls:"MAGEIA5"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"openssh-ldap", rpm:"openssh-ldap~6.6p1~5.9.mga5", rls:"MAGEIA5"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"openssh-server", rpm:"openssh-server~6.6p1~5.9.mga5", rls:"MAGEIA5"))) {
    report += res;
  }

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

exit(0);