CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
EPSS
Percentile
73.2%
Daniel J. Bernstein, Joachim Breitner, Daniel Genkin, Leon Groot Bruinderink, Nadia Heninger, Tanja Lange, Christine van Vredendaal and Yuval Yarom discovered that Libgcrypt is prone to a local side-channel attack allowing full key recovery for RSA-1024.
See https://eprint.iacr.org/2017/627 for details.
#%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-3901. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(101176);
script_version("3.8");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");
script_cve_id("CVE-2017-7526");
script_xref(name:"DSA", value:"3901");
script_name(english:"Debian DSA-3901-1 : libgcrypt20 - 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:
"Daniel J. Bernstein, Joachim Breitner, Daniel Genkin, Leon Groot
Bruinderink, Nadia Heninger, Tanja Lange, Christine van Vredendaal and
Yuval Yarom discovered that Libgcrypt is prone to a local side-channel
attack allowing full key recovery for RSA-1024.
See https://eprint.iacr.org/2017/627 for details."
);
script_set_attribute(
attribute:"see_also",
value:"https://eprint.iacr.org/2017/627"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/jessie/libgcrypt20"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/stretch/libgcrypt20"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2017/dsa-3901"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the libgcrypt20 packages.
For the oldstable distribution (jessie), this problem has been fixed
in version 1.6.3-2+deb8u4.
For the stable distribution (stretch), this problem has been fixed in
version 1.7.6-2+deb9u1."
);
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:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N");
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:libgcrypt20");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
script_set_attribute(attribute:"patch_publication_date", value:"2017/07/02");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/07/03");
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:"8.0", prefix:"libgcrypt11-dev", reference:"1.6.3-2+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"libgcrypt20", reference:"1.6.3-2+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"libgcrypt20-dbg", reference:"1.6.3-2+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"libgcrypt20-dev", reference:"1.6.3-2+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"libgcrypt20-doc", reference:"1.6.3-2+deb8u4")) flag++;
if (deb_check(release:"9.0", prefix:"libgcrypt-mingw-w64-dev", reference:"1.7.6-2+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libgcrypt11-dev", reference:"1.7.6-2+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libgcrypt20", reference:"1.7.6-2+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libgcrypt20-dev", reference:"1.7.6-2+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libgcrypt20-doc", reference:"1.7.6-2+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libgcrypt20-udeb", reference:"1.7.6-2+deb9u1")) 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 | libgcrypt20 | p-cpe:/a:debian:debian_linux:libgcrypt20 |
debian | debian_linux | 8.0 | cpe:/o:debian:debian_linux:8.0 |
debian | debian_linux | 9.0 | cpe:/o:debian:debian_linux:9.0 |
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
EPSS
Percentile
73.2%