http.cookiejar.DefaultPolicy.domain_return_ok in Lib/http/cookiejar.py in Python before 3.7.3 does not correctly validate the domain: it can be tricked into sending existing cookies to the wrong server. An attacker may abuse this flaw by using a server with a hostname that has another valid hostname as a suffix (e.g., pythonicexample.com to steal cookies for example.com). When a program uses http.cookiejar.DefaultPolicy and tries to do an HTTP connection to an attacker-controlled server, existing cookies can be leaked to the attacker. This affects 2.x through 2.7.16, 3.x before 3.4.10, 3.5.x before 3.5.7, 3.6.x before 3.6.9, and 3.7.x before 3.7.3.(CVE-2018-20852)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2020-1375.
#
include('compat.inc');
if (description)
{
script_id(137098);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/08");
script_cve_id("CVE-2018-20852");
script_xref(name:"ALAS", value:"2020-1375");
script_name(english:"Amazon Linux AMI : python27 (ALAS-2020-1375)");
script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux AMI host is missing a security update.");
script_set_attribute(attribute:"description", value:
"http.cookiejar.DefaultPolicy.domain_return_ok in Lib/http/cookiejar.py
in Python before 3.7.3 does not correctly validate the domain: it can
be tricked into sending existing cookies to the wrong server. An
attacker may abuse this flaw by using a server with a hostname that
has another valid hostname as a suffix (e.g., pythonicexample.com to
steal cookies for example.com). When a program uses
http.cookiejar.DefaultPolicy and tries to do an HTTP connection to an
attacker-controlled server, existing cookies can be leaked to the
attacker. This affects 2.x through 2.7.16, 3.x before 3.4.10, 3.5.x
before 3.5.7, 3.6.x before 3.6.9, and 3.7.x before
3.7.3.(CVE-2018-20852)");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/ALAS-2020-1375.html");
script_set_attribute(attribute:"solution", value:
"Run 'yum update python27' to update your system.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-20852");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/07/13");
script_set_attribute(attribute:"patch_publication_date", value:"2020/06/03");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/04");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python27");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python27-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python27-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python27-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python27-test");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python27-tools");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Amazon Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
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 != "A")
{
if (os_ver == 'A') os_ver = 'AMI';
audit(AUDIT_OS_NOT, "Amazon Linux AMI", "Amazon Linux " + os_ver);
}
if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (rpm_check(release:"ALA", reference:"python27-2.7.18-1.137.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"python27-debuginfo-2.7.18-1.137.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"python27-devel-2.7.18-1.137.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"python27-libs-2.7.18-1.137.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"python27-test-2.7.18-1.137.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"python27-tools-2.7.18-1.137.amzn1")) flag++;
if (flag)
{
if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
else security_warning(0);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "python27 / python27-debuginfo / python27-devel / python27-libs / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | python27 | p-cpe:/a:amazon:linux:python27 |
amazon | linux | python27-debuginfo | p-cpe:/a:amazon:linux:python27-debuginfo |
amazon | linux | python27-devel | p-cpe:/a:amazon:linux:python27-devel |
amazon | linux | python27-libs | p-cpe:/a:amazon:linux:python27-libs |
amazon | linux | python27-test | p-cpe:/a:amazon:linux:python27-test |
amazon | linux | python27-tools | p-cpe:/a:amazon:linux:python27-tools |
amazon | linux | cpe:/o:amazon:linux |