9.3 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
9.8 High
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.974 High
EPSS
Percentile
99.9%
Several vulnerabilities were discovered in NSS, the cryptography library developed by the Mozilla project.
CVE-2015-4000 David Adrian et al. reported that it may be feasible to attack Diffie-Hellman-based cipher suites in certain circumstances, compromising the confidentiality and integrity of data encrypted with Transport Layer Security (TLS).
CVE-2015-7181 CVE-2015-7182 CVE-2016-1950 Tyson Smith, David Keeler, and Francis Gabriel discovered heap-based buffer overflows in the ASN.1 DER parser, potentially leading to arbitrary code execution.
CVE-2015-7575 Karthikeyan Bhargavan discovered that TLS client implementation accepted MD5-based signatures for TLS 1.2 connections with forward secrecy, weakening the intended security strength of TLS connections.
CVE-2016-1938 Hanno Boeck discovered that NSS miscomputed the result of integer division for certain inputs. This could weaken the cryptographic protections provided by NSS.
However, NSS implements RSA-CRT leak hardening, so RSA private keys are not directly disclosed by this issue.
CVE-2016-1978 Eric Rescorla discovered a use-after-free vulnerability in the implementation of ECDH-based TLS handshakes, with unknown consequences.
CVE-2016-1979 Tim Taubert discovered a use-after-free vulnerability in ASN.1 DER processing, with application-specific impact.
CVE-2016-2834 Tyson Smith and Jed Davis discovered unspecified memory-safety bugs in NSS.
In addition, the NSS library did not ignore environment variables in processes which underwent a SUID/SGID/AT_SECURE transition at process start. In certain system configurations, this allowed local users to escalate their privileges.
This update contains further correctness and stability fixes without immediate security impact.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-3688. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(93871);
script_version("2.9");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/05");
script_cve_id(
"CVE-2015-4000",
"CVE-2015-7181",
"CVE-2015-7182",
"CVE-2015-7575",
"CVE-2016-1938",
"CVE-2016-1950",
"CVE-2016-1978",
"CVE-2016-1979",
"CVE-2016-2834"
);
script_xref(name:"DSA", value:"3688");
script_xref(name:"CEA-ID", value:"CEA-2021-0004");
script_name(english:"Debian DSA-3688-1 : nss - security update (Logjam) (SLOTH)");
script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
script_set_attribute(attribute:"description", value:
"Several vulnerabilities were discovered in NSS, the cryptography
library developed by the Mozilla project.
- CVE-2015-4000
David Adrian et al. reported that it may be feasible to
attack Diffie-Hellman-based cipher suites in certain
circumstances, compromising the confidentiality and
integrity of data encrypted with Transport Layer
Security (TLS).
- CVE-2015-7181 CVE-2015-7182 CVE-2016-1950
Tyson Smith, David Keeler, and Francis Gabriel
discovered heap-based buffer overflows in the ASN.1 DER
parser, potentially leading to arbitrary code execution.
- CVE-2015-7575
Karthikeyan Bhargavan discovered that TLS client
implementation accepted MD5-based signatures for TLS 1.2
connections with forward secrecy, weakening the intended
security strength of TLS connections.
- CVE-2016-1938
Hanno Boeck discovered that NSS miscomputed the result
of integer division for certain inputs. This could
weaken the cryptographic protections provided by NSS.
However, NSS implements RSA-CRT leak hardening, so RSA
private keys are not directly disclosed by this issue.
- CVE-2016-1978
Eric Rescorla discovered a use-after-free vulnerability
in the implementation of ECDH-based TLS handshakes, with
unknown consequences.
- CVE-2016-1979
Tim Taubert discovered a use-after-free vulnerability in
ASN.1 DER processing, with application-specific impact.
- CVE-2016-2834
Tyson Smith and Jed Davis discovered unspecified
memory-safety bugs in NSS.
In addition, the NSS library did not ignore environment variables in
processes which underwent a SUID/SGID/AT_SECURE transition at process
start. In certain system configurations, this allowed local users to
escalate their privileges.
This update contains further correctness and stability fixes without
immediate security impact.");
script_set_attribute(attribute:"see_also", value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=583651");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2015-4000");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2015-7181");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2015-7182");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2016-1950");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2015-7575");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2016-1938");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2016-1978");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2016-1979");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2016-2834");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/jessie/nss");
script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2016/dsa-3688");
script_set_attribute(attribute:"solution", value:
"Upgrade the nss packages.
For the stable distribution (jessie), these problems have been fixed
in version 2:3.26-1+debu8u1.");
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: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:"exploit_available", value:"false");
script_set_attribute(attribute:"in_the_news", value:"true");
script_set_attribute(attribute:"patch_publication_date", value:"2016/10/05");
script_set_attribute(attribute:"plugin_publication_date", value:"2016/10/06");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:nss");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Debian Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2016-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");
exit(0);
}
include("audit.inc");
include("debian_package.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (deb_check(release:"8.0", prefix:"libnss3", reference:"2:3.26-1+debu8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libnss3-1d", reference:"2:3.26-1+debu8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libnss3-dbg", reference:"2:3.26-1+debu8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libnss3-dev", reference:"2:3.26-1+debu8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libnss3-tools", reference:"2:3.26-1+debu8u1")) flag++;
if (flag)
{
if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
else security_hole(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | nss | p-cpe:/a:debian:debian_linux:nss |
debian | debian_linux | 8.0 | cpe:/o:debian:debian_linux:8.0 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-4000
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7181
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7182
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7575
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1938
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1950
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1978
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1979
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2834
bugs.debian.org/cgi-bin/bugreport.cgi?bug=583651
packages.debian.org/source/jessie/nss
security-tracker.debian.org/tracker/CVE-2015-4000
security-tracker.debian.org/tracker/CVE-2015-7181
security-tracker.debian.org/tracker/CVE-2015-7182
security-tracker.debian.org/tracker/CVE-2015-7575
security-tracker.debian.org/tracker/CVE-2016-1938
security-tracker.debian.org/tracker/CVE-2016-1950
security-tracker.debian.org/tracker/CVE-2016-1978
security-tracker.debian.org/tracker/CVE-2016-1979
security-tracker.debian.org/tracker/CVE-2016-2834
www.debian.org/security/2016/dsa-3688
9.3 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
9.8 High
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.974 High
EPSS
Percentile
99.9%