Git before 2.19.2 on Linux and UNIX executes commands from the current working directory (as if ‘.’ were at the end of $PATH) in certain cases involving the run_command() API and run-command.c, because there was a dangerous change from execvp to execv during 2017.(CVE-2018-19486)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2 Security Advisory ALAS-2018-1136.
#
include("compat.inc");
if (description)
{
script_id(119790);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/27");
script_cve_id("CVE-2018-19486");
script_xref(name:"ALAS", value:"2018-1136");
script_name(english:"Amazon Linux 2 : git (ALAS-2018-1136)");
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:
"Git before 2.19.2 on Linux and UNIX executes commands from the current
working directory (as if '.' were at the end of $PATH) in certain
cases involving the run_command() API and run-command.c, because there
was a dangerous change from execvp to execv during
2017.(CVE-2018-19486)"
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/AL2/ALAS-2018-1136.html"
);
script_set_attribute(
attribute:"solution",
value:"Run 'yum update git' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/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:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-all");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-core");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-core-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-cvs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-daemon");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-email");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-gui");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-p4");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-subtree");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-svn");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:gitk");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:gitweb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:perl-Git");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:perl-Git-SVN");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2");
script_set_attribute(attribute:"vuln_publication_date", value:"2018/11/23");
script_set_attribute(attribute:"patch_publication_date", value:"2018/12/19");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/12/20");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2018-2020 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:"git-2.17.2-2.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"git-all-2.17.2-2.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"git-core-2.17.2-2.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"git-core-doc-2.17.2-2.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"git-cvs-2.17.2-2.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"git-daemon-2.17.2-2.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"git-debuginfo-2.17.2-2.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"git-email-2.17.2-2.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"git-gui-2.17.2-2.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"git-p4-2.17.2-2.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"git-subtree-2.17.2-2.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"git-svn-2.17.2-2.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"gitk-2.17.2-2.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"gitweb-2.17.2-2.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"perl-Git-2.17.2-2.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"perl-Git-SVN-2.17.2-2.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, "git / git-all / git-core / git-core-doc / git-cvs / git-daemon / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | git | p-cpe:/a:amazon:linux:git |
amazon | linux | git-all | p-cpe:/a:amazon:linux:git-all |
amazon | linux | git-core | p-cpe:/a:amazon:linux:git-core |
amazon | linux | git-core-doc | p-cpe:/a:amazon:linux:git-core-doc |
amazon | linux | git-cvs | p-cpe:/a:amazon:linux:git-cvs |
amazon | linux | git-daemon | p-cpe:/a:amazon:linux:git-daemon |
amazon | linux | git-debuginfo | p-cpe:/a:amazon:linux:git-debuginfo |
amazon | linux | git-email | p-cpe:/a:amazon:linux:git-email |
amazon | linux | git-gui | p-cpe:/a:amazon:linux:git-gui |
amazon | linux | git-p4 | p-cpe:/a:amazon:linux:git-p4 |