CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS
Percentile
93.2%
Tavis Ormandy discovered that zlib did not properly verify data streams. Decompressing certain invalid compressed files caused corruption of internal data structures, which caused applications which link to zlib to crash. Specially crafted input might even have allowed arbitrary code execution.
zlib is used by hundreds of server and client applications, so this vulnerability could be exploited to cause Denial of Service attacks to almost all services provided by an Ubuntu system.
Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-148-1. The text
# itself is copyright (C) Canonical, Inc. See
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(20543);
script_version("1.15");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");
script_cve_id("CVE-2005-2096");
script_xref(name:"USN", value:"148-1");
script_name(english:"Ubuntu 4.10 / 5.04 : zlib vulnerability (USN-148-1)");
script_summary(english:"Checks dpkg output for updated packages.");
script_set_attribute(
attribute:"synopsis",
value:
"The remote Ubuntu host is missing one or more security-related
patches."
);
script_set_attribute(
attribute:"description",
value:
"Tavis Ormandy discovered that zlib did not properly verify data
streams. Decompressing certain invalid compressed files caused
corruption of internal data structures, which caused applications
which link to zlib to crash. Specially crafted input might even have
allowed arbitrary code execution.
zlib is used by hundreds of server and client applications, so this
vulnerability could be exploited to cause Denial of Service attacks to
almost all services provided by an Ubuntu system.
Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
);
script_set_attribute(
attribute:"solution",
value:"Update the affected zlib-bin, zlib1g and / or zlib1g-dev packages."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:zlib-bin");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:zlib1g");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:zlib1g-dev");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:4.10");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:5.04");
script_set_attribute(attribute:"patch_publication_date", value:"2005/07/06");
script_set_attribute(attribute:"plugin_publication_date", value:"2006/01/15");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"Ubuntu Security Notice (C) 2005-2019 Canonical, Inc. / NASL script (C) 2006-2016 Tenable Network Security, Inc.");
script_family(english:"Ubuntu Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");
exit(0);
}
include("audit.inc");
include("ubuntu.inc");
include("misc_func.inc");
if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! ereg(pattern:"^(4\.10|5\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 4.10 / 5.04", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu);
flag = 0;
if (ubuntu_check(osver:"4.10", pkgname:"zlib-bin", pkgver:"1.2.1.1-3ubuntu1.1")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"zlib1g", pkgver:"1.2.1.1-3ubuntu1.1")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"zlib1g-dev", pkgver:"1.2.1.1-3ubuntu1.1")) flag++;
if (ubuntu_check(osver:"5.04", pkgname:"zlib-bin", pkgver:"1.2.2-4ubuntu1.1")) flag++;
if (ubuntu_check(osver:"5.04", pkgname:"zlib1g", pkgver:"1.2.2-4ubuntu1.1")) flag++;
if (ubuntu_check(osver:"5.04", pkgname:"zlib1g-dev", pkgver:"1.2.2-4ubuntu1.1")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : ubuntu_report_get()
);
exit(0);
}
else
{
tested = ubuntu_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "zlib-bin / zlib1g / zlib1g-dev");
}
Vendor | Product | Version | CPE |
---|---|---|---|
canonical | ubuntu_linux | 4.10 | cpe:/o:canonical:ubuntu_linux:4.10 |
canonical | ubuntu_linux | 5.04 | cpe:/o:canonical:ubuntu_linux:5.04 |
canonical | ubuntu_linux | zlib-bin | p-cpe:/a:canonical:ubuntu_linux:zlib-bin |
canonical | ubuntu_linux | zlib1g | p-cpe:/a:canonical:ubuntu_linux:zlib1g |
canonical | ubuntu_linux | zlib1g-dev | p-cpe:/a:canonical:ubuntu_linux:zlib1g-dev |