According to the versions of the parallels-server-bm-release / vzkernel / etc packages installed, the Virtuozzo installation on the remote host is affected by the following vulnerabilities :
A double-free can happen in idr_remove_all() in lib/idr.c in the Linux kernel. An unprivileged local attacker can use this flaw for a privilege escalation or for a system crash and a denial of service (DoS).
An integer overflow flaw was found in the way the Linux kernel’s networking subsystem processed TCP Selective Acknowledgment (SACK) segments. While processing SACK segments, the Linux kernel’s socket buffer (SKB) data structure becomes fragmented. Each fragment is about TCP maximum segment size (MSS) bytes. To efficiently process SACK blocks, the Linux kernel merges multiple fragmented SKBs into one, potentially overflowing the variable holding the number of segments. A remote attacker could use this flaw to crash the Linux kernel by sending a crafted sequence of SACK segments on a TCP connection with small value of TCP MSS, resulting in a denial of service (DoS).
tcp: excessive resource consumption while processing SACK blocks allows remote denial of service.
tcp: excessive resource consumption for TCP connections with low MSS allows remote denial of service.
Note that Tenable Network Security has extracted the preceding description block directly from the Virtuozzo security advisory.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(126175);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/05");
script_cve_id(
"CVE-2019-11477",
"CVE-2019-11478",
"CVE-2019-11479",
"CVE-2019-3896"
);
script_xref(name:"CEA-ID", value:"CEA-2019-0456");
script_name(english:"Virtuozzo 6 : parallels-server-bm-release / vzkernel / etc (VZA-2019-052)");
script_set_attribute(attribute:"synopsis", value:
"The remote Virtuozzo host is missing multiple security updates.");
script_set_attribute(attribute:"description", value:
"According to the versions of the parallels-server-bm-release /
vzkernel / etc packages installed, the Virtuozzo installation on the
remote host is affected by the following vulnerabilities :
- A double-free can happen in idr_remove_all() in
lib/idr.c in the Linux kernel. An unprivileged local
attacker can use this flaw for a privilege escalation
or for a system crash and a denial of service (DoS).
- An integer overflow flaw was found in the way the Linux
kernel's networking subsystem processed TCP Selective
Acknowledgment (SACK) segments. While processing SACK
segments, the Linux kernel's socket buffer (SKB) data
structure becomes fragmented. Each fragment is about
TCP maximum segment size (MSS) bytes. To efficiently
process SACK blocks, the Linux kernel merges multiple
fragmented SKBs into one, potentially overflowing the
variable holding the number of segments. A remote
attacker could use this flaw to crash the Linux kernel
by sending a crafted sequence of SACK segments on a TCP
connection with small value of TCP MSS, resulting in a
denial of service (DoS).
- tcp: excessive resource consumption while processing
SACK blocks allows remote denial of service.
- tcp: excessive resource consumption for TCP connections
with low MSS allows remote denial of service.
Note that Tenable Network Security has extracted the preceding
description block directly from the Virtuozzo security advisory.
Tenable has attempted to automatically clean and format it as much as
possible without introducing additional issues.");
script_set_attribute(attribute:"see_also", value:"https://virtuozzosupport.force.com/s/article/VZA-2019-052");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2019:1488");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/vulnerabilities/tcpsack");
script_set_attribute(attribute:"solution", value:
"Update the affected parallels-server-bm-release / vzkernel / etc packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-3896");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"patch_publication_date", value:"2019/06/20");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/06/24");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:virtuozzo:virtuozzo:parallels-server-bm-release");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:virtuozzo:virtuozzo:vzkernel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:virtuozzo:virtuozzo:vzkernel-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:virtuozzo:virtuozzo:vzkernel-firmware");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:virtuozzo:virtuozzo:vzmodules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:virtuozzo:virtuozzo:vzmodules-devel");
script_set_attribute(attribute:"cpe", value:"cpe:/o:virtuozzo:virtuozzo:6");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Virtuozzo Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2019-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/Virtuozzo/release", "Host/Virtuozzo/rpm-list");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Virtuozzo/release");
if (isnull(release) || "Virtuozzo" >!< release) audit(AUDIT_OS_NOT, "Virtuozzo");
os_ver = pregmatch(pattern: "Virtuozzo Linux release ([0-9]+\.[0-9])(\D|$)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Virtuozzo");
os_ver = os_ver[1];
if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Virtuozzo 6.x", "Virtuozzo " + os_ver);
if (!get_kb_item("Host/Virtuozzo/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Virtuozzo", cpu);
flag = 0;
pkgs = ["parallels-server-bm-release-6.0.12-3743",
"vzkernel-2.6.32-042stab139.1",
"vzkernel-devel-2.6.32-042stab139.1",
"vzkernel-firmware-2.6.32-042stab139.1",
"vzmodules-2.6.32-042stab139.1",
"vzmodules-devel-2.6.32-042stab139.1"];
foreach (pkg in pkgs)
if (rpm_check(release:"Virtuozzo-6", reference:pkg)) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : rpm_report_get()
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "parallels-server-bm-release / vzkernel / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
virtuozzo | virtuozzo | parallels-server-bm-release | p-cpe:/a:virtuozzo:virtuozzo:parallels-server-bm-release |
virtuozzo | virtuozzo | vzkernel | p-cpe:/a:virtuozzo:virtuozzo:vzkernel |
virtuozzo | virtuozzo | vzkernel-devel | p-cpe:/a:virtuozzo:virtuozzo:vzkernel-devel |
virtuozzo | virtuozzo | vzkernel-firmware | p-cpe:/a:virtuozzo:virtuozzo:vzkernel-firmware |
virtuozzo | virtuozzo | vzmodules | p-cpe:/a:virtuozzo:virtuozzo:vzmodules |
virtuozzo | virtuozzo | vzmodules-devel | p-cpe:/a:virtuozzo:virtuozzo:vzmodules-devel |
virtuozzo | virtuozzo | 6 | cpe:/o:virtuozzo:virtuozzo:6 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11477
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11478
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11479
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3896
access.redhat.com/errata/RHSA-2019:1488
access.redhat.com/security/vulnerabilities/tcpsack
virtuozzosupport.force.com/s/article/VZA-2019-052