CVSS2
Attack Vector
NETWORK
Attack Complexity
HIGH
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:H/Au:N/C:P/I:P/A:P
EPSS
Percentile
94.4%
Several vulnerabilities were discovered in Rack, a modular Ruby webserver interface. The Common Vulnerabilites and Exposures project identifies the following vulnerabilities :
CVE-2011-5036 Rack computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.
CVE-2013-0183 A remote attacker could cause a denial of service (memory consumption and out-of-memory error) via a long string in a Multipart HTTP packet.
CVE-2013-0184 A vulnerability in Rack::Auth::AbstractRequest allows remote attackers to cause a denial of service via unknown vectors.
CVE-2013-0263 Rack::Session::Cookie allows remote attackers to guess the session cookie, gain privileges, and execute arbitrary code via a timing attack involving an HMAC comparison function that does not run in constant time.
#%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-2783. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(70534);
script_version("1.9");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");
script_cve_id("CVE-2011-5036", "CVE-2013-0183", "CVE-2013-0184", "CVE-2013-0263");
script_bugtraq_id(51197, 57860, 58769);
script_xref(name:"DSA", value:"2783");
script_name(english:"Debian DSA-2783-1 : librack-ruby - 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 Rack, a modular Ruby
webserver interface. The Common Vulnerabilites and Exposures project
identifies the following vulnerabilities :
- CVE-2011-5036
Rack computes hash values for form parameters without
restricting the ability to trigger hash collisions
predictably, which allows remote attackers to cause a
denial of service (CPU consumption) by sending many
crafted parameters.
- CVE-2013-0183
A remote attacker could cause a denial of service
(memory consumption and out-of-memory error) via a long
string in a Multipart HTTP packet.
- CVE-2013-0184
A vulnerability in Rack::Auth::AbstractRequest allows
remote attackers to cause a denial of service via
unknown vectors.
- CVE-2013-0263
Rack::Session::Cookie allows remote attackers to guess
the session cookie, gain privileges, and execute
arbitrary code via a timing attack involving an HMAC
comparison function that does not run in constant time."
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=653963"
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=698440"
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=700226"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2011-5036"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2013-0183"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2013-0184"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2013-0263"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/squeeze/librack-ruby"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2013/dsa-2783"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the librack-ruby packages.
For the oldstable distribution (squeeze), these problems have been
fixed in version 1.1.0-4+squeeze1.
The stable, testing and unstable distributions do not contain the
librack-ruby package. They have already been addressed in version
1.4.1-2.1 of the ruby-rack package."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:P/I:P/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:librack-ruby");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0");
script_set_attribute(attribute:"patch_publication_date", value:"2013/10/21");
script_set_attribute(attribute:"plugin_publication_date", value:"2013/10/22");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2013-2021 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:"6.0", prefix:"librack-ruby", reference:"1.1.0-4+squeeze1")) flag++;
if (deb_check(release:"6.0", prefix:"librack-ruby1.8", reference:"1.1.0-4+squeeze1")) flag++;
if (deb_check(release:"6.0", prefix:"librack-ruby1.9.1", reference:"1.1.0-4+squeeze1")) 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");
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-5036
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0183
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0184
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0263
bugs.debian.org/cgi-bin/bugreport.cgi?bug=653963
bugs.debian.org/cgi-bin/bugreport.cgi?bug=698440
bugs.debian.org/cgi-bin/bugreport.cgi?bug=700226
packages.debian.org/source/squeeze/librack-ruby
security-tracker.debian.org/tracker/CVE-2011-5036
security-tracker.debian.org/tracker/CVE-2013-0183
security-tracker.debian.org/tracker/CVE-2013-0184
security-tracker.debian.org/tracker/CVE-2013-0263
www.debian.org/security/2013/dsa-2783