Tibor Jager, Jorg Schwenk, and Juraj Somorovsky, from Horst Gortz Institute for IT Security, published a paper in ESORICS 2015 where they describe an invalid curve attack in Bouncy Castle Crypto, a Java library for cryptography. An attacker is able to recover private Elliptic Curve keys from different applications, for example, TLS servers.
More information:
http://web-in-security.blogspot.ca/2015/09/practical-invalid-curve-att acks.htmlPractical Invalid Curve Attacks on TLS-ECDH:
http://euklid.org/pdf/ECC_Invalid_Curve.pdf
#%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-3417. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(87359);
script_version("2.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");
script_cve_id("CVE-2015-7940");
script_xref(name:"DSA", value:"3417");
script_name(english:"Debian DSA-3417-1 : bouncycastle - 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:
"Tibor Jager, Jorg Schwenk, and Juraj Somorovsky, from Horst Gortz
Institute for IT Security, published a paper in ESORICS 2015 where
they describe an invalid curve attack in Bouncy Castle Crypto, a Java
library for cryptography. An attacker is able to recover private
Elliptic Curve keys from different applications, for example, TLS
servers.
More information:
http://web-in-security.blogspot.ca/2015/09/practical-invalid-curve-att
acks.htmlPractical Invalid Curve Attacks on TLS-ECDH:
http://euklid.org/pdf/ECC_Invalid_Curve.pdf"
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=802671"
);
# http://web-in-security.blogspot.ca/2015/09/practical-invalid-curve-attacks.html
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?577fd981"
);
script_set_attribute(
attribute:"see_also",
value:"http://euklid.org/pdf/ECC_Invalid_Curve.pdf"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/wheezy/bouncycastle"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/jessie/bouncycastle"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2015/dsa-3417"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the bouncycastle packages.
For the oldstable distribution (wheezy), this problem has been fixed
in version 1.44+dfsg-3.1+deb7u1.
For the stable distribution (jessie), this problem has been fixed in
version 1.49+dfsg-3+deb8u1."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
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:bouncycastle");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
script_set_attribute(attribute:"patch_publication_date", value:"2015/12/14");
script_set_attribute(attribute:"plugin_publication_date", value:"2015/12/15");
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:"7.0", prefix:"libbcmail-java", reference:"1.44+dfsg-3.1+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libbcmail-java-doc", reference:"1.44+dfsg-3.1+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libbcmail-java-gcj", reference:"1.44+dfsg-3.1+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libbcpg-java", reference:"1.44+dfsg-3.1+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libbcpg-java-doc", reference:"1.44+dfsg-3.1+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libbcpg-java-gcj", reference:"1.44+dfsg-3.1+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libbcprov-java", reference:"1.44+dfsg-3.1+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libbcprov-java-doc", reference:"1.44+dfsg-3.1+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libbcprov-java-gcj", reference:"1.44+dfsg-3.1+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libbctsp-java", reference:"1.44+dfsg-3.1+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libbctsp-java-doc", reference:"1.44+dfsg-3.1+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libbctsp-java-gcj", reference:"1.44+dfsg-3.1+deb7u1")) flag++;
if (deb_check(release:"8.0", prefix:"libbcmail-java", reference:"1.49+dfsg-3+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libbcmail-java-doc", reference:"1.49+dfsg-3+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libbcpg-java", reference:"1.49+dfsg-3+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libbcpg-java-doc", reference:"1.49+dfsg-3+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libbcpkix-java", reference:"1.49+dfsg-3+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libbcpkix-java-doc", reference:"1.49+dfsg-3+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libbcprov-java", reference:"1.49+dfsg-3+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libbcprov-java-doc", reference:"1.49+dfsg-3+deb8u1")) 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 | 8.0 | cpe:/o:debian:debian_linux:8.0 |
debian | debian_linux | bouncycastle | p-cpe:/a:debian:debian_linux:bouncycastle |
debian | debian_linux | 7.0 | cpe:/o:debian:debian_linux:7.0 |