Crypt::CBC vulnerability with insecure initialization vector, leading to weaker encryption and potential data acces
Reporter | Title | Published | Views | Family All 24 |
---|---|---|---|---|
![]() | Crypt::CBC: Insecure initialization vector | 17 Mar 200600:00 | – | gentoo |
![]() | CVE-2006-0898 | 25 Feb 200600:00 | – | ubuntucve |
![]() | CVE-2006-0898 | 25 Feb 200611:00 | – | cvelist |
![]() | Debian: Security Advisory (DSA-996-1) | 17 Jan 200800:00 | – | openvas |
![]() | Gentoo Security Advisory GLSA 200603-15 (crypt-cbc) | 24 Sep 200800:00 | – | openvas |
![]() | Gentoo Security Advisory GLSA 200603-15 (crypt-cbc) | 24 Sep 200800:00 | – | openvas |
![]() | Debian Security Advisory DSA 996-1 (libcrypt-cbc-perl) | 17 Jan 200800:00 | – | openvas |
![]() | CVE-2006-0898 | 25 Feb 200611:02 | – | debiancve |
![]() | Insecure Initialization Vector | 10 Apr 202000:32 | – | veracode |
![]() | CVE-2006-0898 | 25 Feb 200611:02 | – | nvd |
Source | Link |
---|---|
security | www.security.gentoo.org/glsa/200603-15 |
cve | www.cve.mitre.org/cgi-bin/cvename.cgi |
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 200603-15.
#
# The advisory text is Copyright (C) 2001-2015 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(21096);
script_version("1.14");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");
script_cve_id("CVE-2006-0898");
script_xref(name:"GLSA", value:"200603-15");
script_name(english:"GLSA-200603-15 : Crypt::CBC: Insecure initialization vector");
script_summary(english:"Checks for updated package(s) in /var/db/pkg");
script_set_attribute(
attribute:"synopsis",
value:
"The remote Gentoo host is missing one or more security-related
patches."
);
script_set_attribute(
attribute:"description",
value:
"The remote host is affected by the vulnerability described in GLSA-200603-15
(Crypt::CBC: Insecure initialization vector)
Lincoln Stein discovered that Crypt::CBC fails to handle 16 bytes
long initializiation vectors correctly when running in the RandomIV
mode, resulting in a weaker encryption because the second part of every
block will always be encrypted with zeros if the blocksize of the
cipher is greater than 8 bytes.
Impact :
An attacker could exploit weak ciphertext produced by Crypt::CBC
to bypass certain security restrictions or to gain access to sensitive
data.
Workaround :
There is no known workaround at this time."
);
script_set_attribute(
attribute:"see_also",
value:"https://security.gentoo.org/glsa/200603-15"
);
script_set_attribute(
attribute:"solution",
value:
"All Crypt::CBC users should upgrade to the latest available
version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=dev-perl/crypt-cbc-2.17'"
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:N");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:crypt-cbc");
script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");
script_set_attribute(attribute:"patch_publication_date", value:"2006/03/17");
script_set_attribute(attribute:"plugin_publication_date", value:"2006/03/18");
script_set_attribute(attribute:"vuln_publication_date", value:"2006/02/23");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2006-2021 Tenable Network Security, Inc.");
script_family(english:"Gentoo Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("qpkg.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (qpkg_check(package:"dev-perl/crypt-cbc", unaffected:make_list("ge 2.17"), vulnerable:make_list("lt 2.17"))) flag++;
if (flag)
{
if (report_verbosity > 0) security_note(port:0, extra:qpkg_report_get());
else security_note(0);
exit(0);
}
else
{
tested = qpkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Crypt::CBC");
}
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