5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.04 Low
EPSS
Percentile
92.1%
CVE-2017-7502
A NULL pointer dereference vulnerability in NSS was found when server receives empty SSLv2 messages. This issue was introduced with the recent removal of SSLv2 protocol from upstream code in 3.24.0 and introduction of dedicated parser able to handle just sslv2-style hello messages.
For Debian 7 ‘Wheezy’, this problem has been fixed in version 2:3.26-1+debu7u4.
We recommend that you upgrade your nss packages.
NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-971-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(100559);
script_version("3.9");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");
script_cve_id("CVE-2017-7502");
script_name(english:"Debian DLA-971-1 : nss security update");
script_summary(english:"Checks dpkg output for the updated packages.");
script_set_attribute(
attribute:"synopsis",
value:"The remote Debian host is missing a security update."
);
script_set_attribute(
attribute:"description",
value:
"CVE-2017-7502
A NULL pointer dereference vulnerability in NSS was found when server
receives empty SSLv2 messages. This issue was introduced with the
recent removal of SSLv2 protocol from upstream code in 3.24.0 and
introduction of dedicated parser able to handle just sslv2-style hello
messages.
For Debian 7 'Wheezy', this problem has been fixed in version
2:3.26-1+debu7u4.
We recommend that you upgrade your nss packages.
NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA security advisory. Tenable has attempted
to automatically clean and format it as much as possible without
introducing additional issues."
);
script_set_attribute(
attribute:"see_also",
value:"https://lists.debian.org/debian-lts-announce/2017/05/msg00041.html"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/wheezy/nss"
);
script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:N/I:N/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:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnss3");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnss3-1d");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnss3-dbg");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnss3-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnss3-tools");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");
script_set_attribute(attribute:"patch_publication_date", value:"2017/05/31");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/06/01");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2017-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Debian Local Security Checks");
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:"7.0", prefix:"libnss3", reference:"2:3.26-1+debu7u4")) flag++;
if (deb_check(release:"7.0", prefix:"libnss3-1d", reference:"2:3.26-1+debu7u4")) flag++;
if (deb_check(release:"7.0", prefix:"libnss3-dbg", reference:"2:3.26-1+debu7u4")) flag++;
if (deb_check(release:"7.0", prefix:"libnss3-dev", reference:"2:3.26-1+debu7u4")) flag++;
if (deb_check(release:"7.0", prefix:"libnss3-tools", reference:"2:3.26-1+debu7u4")) flag++;
if (flag)
{
if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
else security_warning(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | libnss3 | p-cpe:/a:debian:debian_linux:libnss3 |
debian | debian_linux | libnss3-1d | p-cpe:/a:debian:debian_linux:libnss3-1d |
debian | debian_linux | libnss3-dbg | p-cpe:/a:debian:debian_linux:libnss3-dbg |
debian | debian_linux | libnss3-dev | p-cpe:/a:debian:debian_linux:libnss3-dev |
debian | debian_linux | libnss3-tools | p-cpe:/a:debian:debian_linux:libnss3-tools |
debian | debian_linux | 7.0 | cpe:/o:debian:debian_linux:7.0 |
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.04 Low
EPSS
Percentile
92.1%