9.3 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
0.185 Low
EPSS
Percentile
96.2%
Several vulnerabilities were discovered in OpenSSL, an implementation of TLS and related protocols. The Common Vulnerabilities and Exposures project identifies the following vulnerabilities :
CVE-2011-4108 The DTLS implementation performs a MAC check only if certain padding is valid, which makes it easier for remote attackers to recover plaintext via a padding oracle attack.
CVE-2011-4109 A double free vulnerability when X509_V_FLAG_POLICY_CHECK is enabled, allows remote attackers to cause applications crashes and potentially allow execution of arbitrary code by triggering failure of a policy check.
CVE-2011-4354 On 32-bit systems, the operations on NIST elliptic curves P-256 and P-384 are not correctly implemented, potentially leaking the private ECC key of a TLS server.
(Regular RSA-based keys are not affected by this vulnerability.)
CVE-2011-4576 The SSL 3.0 implementation does not properly initialize data structures for block cipher padding, which might allow remote attackers to obtain sensitive information by decrypting the padding data sent by an SSL peer.
CVE-2011-4619 The Server Gated Cryptography (SGC) implementation in OpenSSL does not properly handle handshake restarts, unnecessarily simplifying CPU exhaustion attacks.
#%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-2390. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(57543);
script_version("1.13");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");
script_cve_id("CVE-2011-4108", "CVE-2011-4109", "CVE-2011-4354", "CVE-2011-4576", "CVE-2011-4619");
script_bugtraq_id(50882, 51281);
script_xref(name:"DSA", value:"2390");
script_name(english:"Debian DSA-2390-1 : openssl - several vulnerabilities");
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:
"Several vulnerabilities were discovered in OpenSSL, an implementation
of TLS and related protocols. The Common Vulnerabilities and Exposures
project identifies the following vulnerabilities :
- CVE-2011-4108
The DTLS implementation performs a MAC check only if
certain padding is valid, which makes it easier for
remote attackers to recover plaintext via a padding
oracle attack.
- CVE-2011-4109
A double free vulnerability when
X509_V_FLAG_POLICY_CHECK is enabled, allows remote
attackers to cause applications crashes and potentially
allow execution of arbitrary code by triggering failure
of a policy check.
- CVE-2011-4354
On 32-bit systems, the operations on NIST elliptic
curves P-256 and P-384 are not correctly implemented,
potentially leaking the private ECC key of a TLS server.
(Regular RSA-based keys are not affected by this
vulnerability.)
- CVE-2011-4576
The SSL 3.0 implementation does not properly initialize
data structures for block cipher padding, which might
allow remote attackers to obtain sensitive information
by decrypting the padding data sent by an SSL peer.
- CVE-2011-4619
The Server Gated Cryptography (SGC) implementation in
OpenSSL does not properly handle handshake restarts,
unnecessarily simplifying CPU exhaustion attacks."
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2011-4108"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2011-4109"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2011-4354"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2011-4576"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2011-4619"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/squeeze/openssl"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2012/dsa-2390"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the openssl packages.
For the oldstable distribution (lenny), these problems have been fixed
in version 0.9.8g-15+lenny15.
For the stable distribution (squeeze), these problems have been fixed
in version 0.9.8o-4squeeze5."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
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:openssl");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:5.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0");
script_set_attribute(attribute:"patch_publication_date", value:"2012/01/15");
script_set_attribute(attribute:"plugin_publication_date", value:"2012/01/16");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2012-2021 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:"5.0", prefix:"openssl", reference:"0.9.8g-15+lenny15")) flag++;
if (deb_check(release:"6.0", prefix:"libcrypto0.9.8-udeb", reference:"0.9.8o-4squeeze5")) flag++;
if (deb_check(release:"6.0", prefix:"libssl-dev", reference:"0.9.8o-4squeeze5")) flag++;
if (deb_check(release:"6.0", prefix:"libssl0.9.8", reference:"0.9.8o-4squeeze5")) flag++;
if (deb_check(release:"6.0", prefix:"libssl0.9.8-dbg", reference:"0.9.8o-4squeeze5")) flag++;
if (deb_check(release:"6.0", prefix:"openssl", reference:"0.9.8o-4squeeze5")) flag++;
if (flag)
{
if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
else security_hole(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | openssl | p-cpe:/a:debian:debian_linux:openssl |
debian | debian_linux | 5.0 | cpe:/o:debian:debian_linux:5.0 |
debian | debian_linux | 6.0 | cpe:/o:debian:debian_linux:6.0 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4108
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4109
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4354
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4576
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4619
packages.debian.org/source/squeeze/openssl
security-tracker.debian.org/tracker/CVE-2011-4108
security-tracker.debian.org/tracker/CVE-2011-4109
security-tracker.debian.org/tracker/CVE-2011-4354
security-tracker.debian.org/tracker/CVE-2011-4576
security-tracker.debian.org/tracker/CVE-2011-4619
www.debian.org/security/2012/dsa-2390