It was found that the :source!
command was not restricted by the sandbox mode. If modeline was explicitly enabled, opening a specially crafted text file in vim could result in arbitrary command execution.
(CVE-2019-12735)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2 Security Advisory ALAS-2019-1239.
#
include("compat.inc");
if (description)
{
script_id(127460);
script_version("1.3");
script_cvs_date("Date: 2019/09/24 11:01:32");
script_cve_id("CVE-2019-12735");
script_xref(name:"ALAS", value:"2019-1239");
script_name(english:"Amazon Linux 2 : vim (ALAS-2019-1239)");
script_summary(english:"Checks rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:"The remote Amazon Linux 2 host is missing a security update."
);
script_set_attribute(
attribute:"description",
value:
"It was found that the `:source!` command was not restricted by the
sandbox mode. If modeline was explicitly enabled, opening a specially
crafted text file in vim could result in arbitrary command execution.
(CVE-2019-12735)"
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/AL2/ALAS-2019-1239.html"
);
script_set_attribute(
attribute:"solution",
value:"Run 'yum update 'vim*'' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:vim-X11");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:vim-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:vim-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:vim-enhanced");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:vim-filesystem");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:vim-minimal");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/06/05");
script_set_attribute(attribute:"patch_publication_date", value:"2019/08/27");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/12");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Amazon Linux Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/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/AmazonLinux/release");
if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux");
os_ver = pregmatch(pattern: "^AL(A|\d)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "2")
{
if (os_ver == 'A') os_ver = 'AMI';
audit(AUDIT_OS_NOT, "Amazon Linux 2", "Amazon Linux " + os_ver);
}
if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (rpm_check(release:"AL2", reference:"vim-X11-8.1.1602-1.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"vim-common-8.1.1602-1.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"vim-debuginfo-8.1.1602-1.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"vim-enhanced-8.1.1602-1.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"vim-filesystem-8.1.1602-1.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"vim-minimal-8.1.1602-1.amzn2")) flag++;
if (flag)
{
if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
else security_hole(0);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "vim-X11 / vim-common / vim-debuginfo / vim-enhanced / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | vim-x11 | p-cpe:/a:amazon:linux:vim-x11 |
amazon | linux | vim-common | p-cpe:/a:amazon:linux:vim-common |
amazon | linux | vim-debuginfo | p-cpe:/a:amazon:linux:vim-debuginfo |
amazon | linux | vim-enhanced | p-cpe:/a:amazon:linux:vim-enhanced |
amazon | linux | vim-filesystem | p-cpe:/a:amazon:linux:vim-filesystem |
amazon | linux | vim-minimal | p-cpe:/a:amazon:linux:vim-minimal |
amazon | linux | 2 | cpe:/o:amazon:linux:2 |