2.1 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
3.8 Low
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
0.0005 Low
EPSS
Percentile
17.2%
The remote Ubuntu 21.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5009-2 advisory.
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the bootp_input() function and could occur while processing a udp packet that is smaller than the size of the ‘bootp_t’ structure. A malicious guest could use this flaw to leak 10 bytes of uninitialized heap memory from the host. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3592)
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the size of the ‘udphdr’ structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3593)
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the udp_input() function and could occur while processing a udp packet that is smaller than the size of the ‘udphdr’ structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3594)
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the size of the ‘tftp_t’ structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3595)
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%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-5009-2. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(156562);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/01/17");
script_cve_id(
"CVE-2021-3592",
"CVE-2021-3593",
"CVE-2021-3594",
"CVE-2021-3595"
);
script_xref(name:"USN", value:"5009-2");
script_name(english:"Ubuntu 21.10 : libslirp vulnerabilities (USN-5009-2)");
script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Ubuntu 21.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the
USN-5009-2 advisory.
- An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw
exists in the bootp_input() function and could occur while processing a udp packet that is smaller than
the size of the 'bootp_t' structure. A malicious guest could use this flaw to leak 10 bytes of
uninitialized heap memory from the host. The highest threat from this vulnerability is to data
confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3592)
- An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw
exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the
size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory
disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw
affects libslirp versions prior to 4.6.0. (CVE-2021-3593)
- An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw
exists in the udp_input() function and could occur while processing a udp packet that is smaller than the
size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory
disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw
affects libslirp versions prior to 4.6.0. (CVE-2021-3594)
- An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw
exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the
size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory
disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw
affects libslirp versions prior to 4.6.0. (CVE-2021-3595)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-5009-2");
script_set_attribute(attribute:"solution", value:
"Update the affected libslirp-dev and / or libslirp0 packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-3595");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2021/06/15");
script_set_attribute(attribute:"patch_publication_date", value:"2021/10/26");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/01/07");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:21.10");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libslirp-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libslirp0");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Ubuntu Local Security Checks");
script_copyright(english:"Ubuntu Security Notice (C) 2022-2023 Canonical, Inc. / NASL script (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
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);
var release = get_kb_item('Host/Ubuntu/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
var release = chomp(release);
if (! preg(pattern:"^(21\.10)$", string:release)) audit(AUDIT_OS_NOT, 'Ubuntu 21.10', 'Ubuntu ' + release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);
var pkgs = [
{'osver': '21.10', 'pkgname': 'libslirp-dev', 'pkgver': '4.4.0-1ubuntu0.21.10.1'},
{'osver': '21.10', 'pkgname': 'libslirp0', 'pkgver': '4.4.0-1ubuntu0.21.10.1'}
];
var flag = 0;
foreach package_array ( pkgs ) {
var osver = NULL;
var pkgname = NULL;
var pkgver = NULL;
if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
if (osver && pkgname && pkgver) {
if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_NOTE,
extra : ubuntu_report_get()
);
exit(0);
}
else
{
var tested = ubuntu_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libslirp-dev / libslirp0');
}
Vendor | Product | Version | CPE |
---|---|---|---|
canonical | ubuntu_linux | libslirp-dev | p-cpe:/a:canonical:ubuntu_linux:libslirp-dev |
canonical | ubuntu_linux | libslirp0 | p-cpe:/a:canonical:ubuntu_linux:libslirp0 |
canonical | ubuntu_linux | 21.10 | cpe:/o:canonical:ubuntu_linux:21.10 |
2.1 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
3.8 Low
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
0.0005 Low
EPSS
Percentile
17.2%