A microprocessor side-channel vulnerability was found on SMT (e.g, Hyper-Threading) architectures. An attacker running a malicious process on the same core of the processor as the victim process can extract certain secret information.(CVE-2018-5407)
If an application encounters a fatal protocol error and then calls SSL_shutdown() twice (once to send a close_notify, and once to receive one) then OpenSSL can respond differently to the calling application if a 0 byte record is received with invalid padding compared to if a 0 byte record is received with an invalid MAC. If the application then behaves differently based on that in a way that is detectable to the remote peer, then this amounts to a padding oracle that could be used to decrypt data. In order for this to be exploitable ‘non-stitched’ ciphersuites must be in use. Stitched ciphersuites are optimised implementations of certain commonly used ciphersuites. Also the application must call SSL_shutdown() twice even if a protocol error has occurred (applications should not do this but some do anyway).(CVE-2019-1559)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2 Security Advisory ALAS-2019-1188.
#
include("compat.inc");
if (description)
{
script_id(124124);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/06");
script_cve_id("CVE-2018-5407", "CVE-2019-1559");
script_xref(name:"ALAS", value:"2019-1188");
script_xref(name:"CEA-ID", value:"CEA-2021-0004");
script_name(english:"Amazon Linux 2 : openssl (ALAS-2019-1188)");
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:
"A microprocessor side-channel vulnerability was found on SMT (e.g,
Hyper-Threading) architectures. An attacker running a malicious
process on the same core of the processor as the victim process can
extract certain secret information.(CVE-2018-5407)
If an application encounters a fatal protocol error and then calls
SSL_shutdown() twice (once to send a close_notify, and once to receive
one) then OpenSSL can respond differently to the calling application
if a 0 byte record is received with invalid padding compared to if a 0
byte record is received with an invalid MAC. If the application then
behaves differently based on that in a way that is detectable to the
remote peer, then this amounts to a padding oracle that could be used
to decrypt data. In order for this to be exploitable 'non-stitched'
ciphersuites must be in use. Stitched ciphersuites are optimised
implementations of certain commonly used ciphersuites. Also the
application must call SSL_shutdown() twice even if a protocol error
has occurred (applications should not do this but some do
anyway).(CVE-2019-1559)"
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/AL2/ALAS-2019-1188.html"
);
script_set_attribute(
attribute:"solution",
value:"Run 'yum update openssl' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:H/PR:N/UI:N/S:U/C:H/I:N/A:N");
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:openssl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:openssl-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:openssl-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:openssl-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:openssl-perl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:openssl-static");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2");
script_set_attribute(attribute:"vuln_publication_date", value:"2018/11/15");
script_set_attribute(attribute:"patch_publication_date", value:"2019/04/04");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/18");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2019-2022 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:"openssl-1.0.2k-16.amzn2.1.1")) flag++;
if (rpm_check(release:"AL2", reference:"openssl-debuginfo-1.0.2k-16.amzn2.1.1")) flag++;
if (rpm_check(release:"AL2", reference:"openssl-devel-1.0.2k-16.amzn2.1.1")) flag++;
if (rpm_check(release:"AL2", reference:"openssl-libs-1.0.2k-16.amzn2.1.1")) flag++;
if (rpm_check(release:"AL2", reference:"openssl-perl-1.0.2k-16.amzn2.1.1")) flag++;
if (rpm_check(release:"AL2", reference:"openssl-static-1.0.2k-16.amzn2.1.1")) 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, "openssl / openssl-debuginfo / openssl-devel / openssl-libs / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | openssl | p-cpe:/a:amazon:linux:openssl |
amazon | linux | openssl-debuginfo | p-cpe:/a:amazon:linux:openssl-debuginfo |
amazon | linux | openssl-devel | p-cpe:/a:amazon:linux:openssl-devel |
amazon | linux | openssl-libs | p-cpe:/a:amazon:linux:openssl-libs |
amazon | linux | openssl-perl | p-cpe:/a:amazon:linux:openssl-perl |
amazon | linux | openssl-static | p-cpe:/a:amazon:linux:openssl-static |
amazon | linux | 2 | cpe:/o:amazon:linux:2 |