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
EPSS
Percentile
96.3%
Kurt Roeckx discovered that decoding a specific certificate with very long DistinguishedName (DN) entries leads to double free. A remote attacker can take advantage of this flaw by creating a specially crafted certificate that, when processed by an application compiled against GnuTLS, could cause the application to crash resulting in a denial of service.
#%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-3334. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(85357);
script_version("2.8");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");
script_cve_id("CVE-2015-6251");
script_xref(name:"DSA", value:"3334");
script_name(english:"Debian DSA-3334-1 : gnutls28 - security update");
script_summary(english:"Checks dpkg output for the updated package");
script_set_attribute(
attribute:"synopsis",
value:"The remote Debian host is missing a security-related update."
);
script_set_attribute(
attribute:"description",
value:
"Kurt Roeckx discovered that decoding a specific certificate with very
long DistinguishedName (DN) entries leads to double free. A remote
attacker can take advantage of this flaw by creating a specially
crafted certificate that, when processed by an application compiled
against GnuTLS, could cause the application to crash resulting in a
denial of service."
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=795068"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/jessie/gnutls28"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2015/dsa-3334"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the gnutls28 packages.
For the stable distribution (jessie), this problem has been fixed in
version 3.3.8-6+deb8u2."
);
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_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:gnutls28");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
script_set_attribute(attribute:"patch_publication_date", value:"2015/08/12");
script_set_attribute(attribute:"plugin_publication_date", value:"2015/08/13");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2015-2021 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:"8.0", prefix:"gnutls-bin", reference:"3.3.8-6+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"gnutls-doc", reference:"3.3.8-6+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"guile-gnutls", reference:"3.3.8-6+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"libgnutls-deb0-28", reference:"3.3.8-6+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"libgnutls-openssl27", reference:"3.3.8-6+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"libgnutls28-dbg", reference:"3.3.8-6+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"libgnutls28-dev", reference:"3.3.8-6+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"libgnutlsxx28", reference:"3.3.8-6+deb8u2")) 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");