CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
83.0%
The version of nspr installed on the remote host is prior to 4.25.0-2.45. The version of nss-softokn installed on the remote host is prior to 3.53.1-6.46. The version of nss-util installed on the remote host is prior to 3.53.1-1.58. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2021-1522 advisory.
When importing a curve25519 private key in PKCS#8format with leading 0x00 bytes, it is possible to trigger an out-of-bounds read in the Network Security Services (NSS) library. This could lead to information disclosure. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.
(CVE-2019-11719)
A vulnerability exists where it possible to force Network Security Services (NSS) to sign CertificateVerify with PKCS#1 v1.5 signatures when those are the only ones advertised by server in CertificateRequest in TLS 1.3. PKCS#1 v1.5 signatures should not be used for TLS 1.3 messages. This vulnerability affects Firefox < 68. (CVE-2019-11727)
Improper refcounting of soft token session objects could cause a use-after-free and crash (likely limited to a denial of service). This vulnerability affects Firefox < 71. (CVE-2019-11756)
In Network Security Services (NSS) before 3.46, several cryptographic primitives had missing length checks. In cases where the application calling the library did not perform a sanity check on the inputs it could result in a crash due to a buffer overflow. (CVE-2019-17006)
After a HelloRetryRequest has been sent, the client may negotiate a lower protocol that TLS 1.3, resulting in an invalid state transition in the TLS State Machine. If the client gets into this state, incoming Application Data records will be ignored. This vulnerability affects Firefox < 72. (CVE-2019-17023)
When converting coordinates from projective to affine, the modular inversion was not performed in constant time, resulting in a possible timing-based side channel attack. This vulnerability affects Firefox < 80 and Firefox for Android < 80. (CVE-2020-12400)
During ECDSA signature generation, padding applied in the nonce designed to ensure constant-time scalar multiplication was removed, resulting in variable-time execution dependent on secret data. This vulnerability affects Firefox < 80 and Firefox for Android < 80. (CVE-2020-12401)
During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform electromagnetic-based side channel attacks to record traces leading to the recovery of the secret primes.
Note: An unmodified Firefox browser does not generate RSA keys in normal operation and is not affected, but products built on top of it might. This vulnerability affects Firefox < 78. (CVE-2020-12402)
A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS in versions before 3.55. When using multi-part Chacha20, it could cause out-of-bounds reads. This issue was fixed by explicitly disabling multi-part ChaCha20 (which was not functioning correctly) and strictly enforcing tag length. The highest threat from this vulnerability is to confidentiality and system availability. (CVE-2020-12403)
When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which leaked partial information about the nonce used during signature generation. Given an electro-magnetic trace of a few signature generations, the private key could have been computed. This vulnerability affects Firefox < 80 and Firefox for Android < 80. (CVE-2020-6829)
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2021-1522.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(151520);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/08");
script_cve_id(
"CVE-2019-11719",
"CVE-2019-11727",
"CVE-2019-11756",
"CVE-2019-17006",
"CVE-2019-17023",
"CVE-2020-6829",
"CVE-2020-12400",
"CVE-2020-12401",
"CVE-2020-12402",
"CVE-2020-12403"
);
script_xref(name:"IAVA", value:"2019-A-0231-S");
script_xref(name:"IAVA", value:"2019-A-0438-S");
script_xref(name:"IAVA", value:"2020-A-0002-S");
script_xref(name:"IAVA", value:"2020-A-0391-S");
script_xref(name:"IAVA", value:"2020-A-0287-S");
script_xref(name:"ALAS", value:"2021-1522");
script_name(english:"Amazon Linux AMI : nspr, nss-softokn, nss-util (ALAS-2021-1522)");
script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux AMI host is missing a security update.");
script_set_attribute(attribute:"description", value:
"The version of nspr installed on the remote host is prior to 4.25.0-2.45. The version of nss-softokn installed on the
remote host is prior to 3.53.1-6.46. The version of nss-util installed on the remote host is prior to 3.53.1-1.58. It
is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2021-1522 advisory.
- When importing a curve25519 private key in PKCS#8format with leading 0x00 bytes, it is possible to trigger
an out-of-bounds read in the Network Security Services (NSS) library. This could lead to information
disclosure. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.
(CVE-2019-11719)
- A vulnerability exists where it possible to force Network Security Services (NSS) to sign
CertificateVerify with PKCS#1 v1.5 signatures when those are the only ones advertised by server in
CertificateRequest in TLS 1.3. PKCS#1 v1.5 signatures should not be used for TLS 1.3 messages. This
vulnerability affects Firefox < 68. (CVE-2019-11727)
- Improper refcounting of soft token session objects could cause a use-after-free and crash (likely limited
to a denial of service). This vulnerability affects Firefox < 71. (CVE-2019-11756)
- In Network Security Services (NSS) before 3.46, several cryptographic primitives had missing length
checks. In cases where the application calling the library did not perform a sanity check on the inputs it
could result in a crash due to a buffer overflow. (CVE-2019-17006)
- After a HelloRetryRequest has been sent, the client may negotiate a lower protocol that TLS 1.3, resulting
in an invalid state transition in the TLS State Machine. If the client gets into this state, incoming
Application Data records will be ignored. This vulnerability affects Firefox < 72. (CVE-2019-17023)
- When converting coordinates from projective to affine, the modular inversion was not performed in constant
time, resulting in a possible timing-based side channel attack. This vulnerability affects Firefox < 80
and Firefox for Android < 80. (CVE-2020-12400)
- During ECDSA signature generation, padding applied in the nonce designed to ensure constant-time scalar
multiplication was removed, resulting in variable-time execution dependent on secret data. This
vulnerability affects Firefox < 80 and Firefox for Android < 80. (CVE-2020-12401)
- During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean
Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform
electromagnetic-based side channel attacks to record traces leading to the recovery of the secret primes.
*Note:* An unmodified Firefox browser does not generate RSA keys in normal operation and is not affected,
but products built on top of it might. This vulnerability affects Firefox < 78. (CVE-2020-12402)
- A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS in versions before 3.55. When using
multi-part Chacha20, it could cause out-of-bounds reads. This issue was fixed by explicitly disabling
multi-part ChaCha20 (which was not functioning correctly) and strictly enforcing tag length. The highest
threat from this vulnerability is to confidentiality and system availability. (CVE-2020-12403)
- When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which
leaked partial information about the nonce used during signature generation. Given an electro-magnetic
trace of a few signature generations, the private key could have been computed. This vulnerability affects
Firefox < 80 and Firefox for Android < 80. (CVE-2020-6829)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/ALAS-2021-1522.html");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2019-11719");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2019-11727");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2019-11756");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2019-17006");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2019-17023");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-12400");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-12401");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-12402");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-12403");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-6829");
script_set_attribute(attribute:"solution", value:
"Run 'yum update nspr' to update your system.
Run 'yum update nss-softokn' to update your system.
Run 'yum update nss-util' to update your system.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-17006");
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:"2019/07/09");
script_set_attribute(attribute:"patch_publication_date", value:"2021/07/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/07/13");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nspr");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nspr-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nspr-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nss-softokn");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nss-softokn-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nss-softokn-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nss-softokn-freebl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nss-softokn-freebl-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nss-util");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nss-util-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nss-util-devel");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Amazon Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021-2023 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);
pkgs = [
{'reference':'nspr-4.25.0-2.45.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nspr-4.25.0-2.45.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nspr-debuginfo-4.25.0-2.45.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nspr-debuginfo-4.25.0-2.45.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nspr-devel-4.25.0-2.45.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nspr-devel-4.25.0-2.45.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nss-softokn-3.53.1-6.46.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nss-softokn-3.53.1-6.46.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nss-softokn-debuginfo-3.53.1-6.46.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nss-softokn-debuginfo-3.53.1-6.46.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nss-softokn-devel-3.53.1-6.46.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nss-softokn-devel-3.53.1-6.46.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nss-softokn-freebl-3.53.1-6.46.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nss-softokn-freebl-3.53.1-6.46.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nss-softokn-freebl-devel-3.53.1-6.46.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nss-softokn-freebl-devel-3.53.1-6.46.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nss-util-3.53.1-1.58.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nss-util-3.53.1-1.58.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nss-util-debuginfo-3.53.1-1.58.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nss-util-debuginfo-3.53.1-1.58.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nss-util-devel-3.53.1-1.58.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'nss-util-devel-3.53.1-1.58.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE}
];
flag = 0;
foreach package_array ( pkgs ) {
reference = NULL;
release = NULL;
cpu = NULL;
el_string = NULL;
rpm_spec_vers_cmp = NULL;
allowmaj = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) release = package_array['release'];
if (!empty_or_null(package_array['cpu'])) cpu = package_array['cpu'];
if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
if (reference && release) {
if (rpm_check(release:release, cpu:cpu, reference:reference, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) 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, "nspr / nspr-debuginfo / nspr-devel / etc");
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11719
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11727
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11756
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-17006
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-17023
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12400
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12401
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12402
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12403
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6829
access.redhat.com/security/cve/CVE-2019-11719
access.redhat.com/security/cve/CVE-2019-11727
access.redhat.com/security/cve/CVE-2019-11756
access.redhat.com/security/cve/CVE-2019-17006
access.redhat.com/security/cve/CVE-2019-17023
access.redhat.com/security/cve/CVE-2020-12400
access.redhat.com/security/cve/CVE-2020-12401
access.redhat.com/security/cve/CVE-2020-12402
access.redhat.com/security/cve/CVE-2020-12403
access.redhat.com/security/cve/CVE-2020-6829
alas.aws.amazon.com/ALAS-2021-1522.html
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
83.0%