8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.6 High
AI Score
Confidence
High
0.015 Low
EPSS
Percentile
86.7%
The remote Ubuntu 18.04 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6538-2 advisory.
A memory disclosure vulnerability was found in PostgreSQL that allows remote users to access sensitive information by exploiting certain aggregate function calls with ‘unknown’-type arguments. Handling ‘unknown’-type values from string literals without type designation can disclose bytes, potentially revealing notable and confidential information. This issue exists due to excessive data output in aggregate function calls, enabling remote users to read some portion of system memory. (CVE-2023-5868)
A flaw was found in PostgreSQL that allows authenticated database users to execute arbitrary code through missing overflow checks during SQL array value modification. This issue exists due to an integer overflow during array modification where a remote user can trigger the overflow by providing specially crafted data. This enables the execution of arbitrary code on the target system, allowing users to write arbitrary bytes to memory and extensively read the server’s memory. (CVE-2023-5869)
A flaw was found in PostgreSQL involving the pg_cancel_backend role that signals background workers, including the logical replication launcher, autovacuum workers, and the autovacuum launcher. Successful exploitation requires a non-core extension with a less-resilient background worker and would affect that specific background worker only. This issue may allow a remote high privileged user to launch a denial of service (DoS) attack. (CVE-2023-5870)
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6538-2. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##
include('compat.inc');
if (description)
{
script_id(189108);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/17");
script_cve_id("CVE-2023-5868", "CVE-2023-5869", "CVE-2023-5870");
script_xref(name:"USN", value:"6538-2");
script_name(english:"Ubuntu 18.04 ESM : PostgreSQL vulnerabilities (USN-6538-2)");
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 18.04 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in
the USN-6538-2 advisory.
- A memory disclosure vulnerability was found in PostgreSQL that allows remote users to access sensitive
information by exploiting certain aggregate function calls with 'unknown'-type arguments. Handling
'unknown'-type values from string literals without type designation can disclose bytes, potentially
revealing notable and confidential information. This issue exists due to excessive data output in
aggregate function calls, enabling remote users to read some portion of system memory. (CVE-2023-5868)
- A flaw was found in PostgreSQL that allows authenticated database users to execute arbitrary code through
missing overflow checks during SQL array value modification. This issue exists due to an integer overflow
during array modification where a remote user can trigger the overflow by providing specially crafted
data. This enables the execution of arbitrary code on the target system, allowing users to write arbitrary
bytes to memory and extensively read the server's memory. (CVE-2023-5869)
- A flaw was found in PostgreSQL involving the pg_cancel_backend role that signals background workers,
including the logical replication launcher, autovacuum workers, and the autovacuum launcher. Successful
exploitation requires a non-core extension with a less-resilient background worker and would affect that
specific background worker only. This issue may allow a remote high privileged user to launch a denial of
service (DoS) attack. (CVE-2023-5870)
Note that Nessus has not tested for these issues 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-6538-2");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-5869");
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:"2023/11/09");
script_set_attribute(attribute:"patch_publication_date", value:"2024/01/17");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/01/17");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:esm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libecpg-compat3");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libecpg-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libecpg6");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpgtypes3");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpq-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpq5");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-10");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-client-10");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-plperl-10");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-plpython-10");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-plpython3-10");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-pltcl-10");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-server-dev-10");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Ubuntu Local Security Checks");
script_copyright(english:"Ubuntu Security Notice (C) 2024 Canonical, Inc. / NASL script (C) 2024 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('debian_package.inc');
if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('18.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04', 'Ubuntu ' + os_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': '18.04', 'pkgname': 'libecpg-compat3', 'pkgver': '10.23-0ubuntu0.18.04.2+esm1'},
{'osver': '18.04', 'pkgname': 'libecpg-dev', 'pkgver': '10.23-0ubuntu0.18.04.2+esm1'},
{'osver': '18.04', 'pkgname': 'libecpg6', 'pkgver': '10.23-0ubuntu0.18.04.2+esm1'},
{'osver': '18.04', 'pkgname': 'libpgtypes3', 'pkgver': '10.23-0ubuntu0.18.04.2+esm1'},
{'osver': '18.04', 'pkgname': 'libpq-dev', 'pkgver': '10.23-0ubuntu0.18.04.2+esm1'},
{'osver': '18.04', 'pkgname': 'libpq5', 'pkgver': '10.23-0ubuntu0.18.04.2+esm1'},
{'osver': '18.04', 'pkgname': 'postgresql-10', 'pkgver': '10.23-0ubuntu0.18.04.2+esm1'},
{'osver': '18.04', 'pkgname': 'postgresql-client-10', 'pkgver': '10.23-0ubuntu0.18.04.2+esm1'},
{'osver': '18.04', 'pkgname': 'postgresql-plperl-10', 'pkgver': '10.23-0ubuntu0.18.04.2+esm1'},
{'osver': '18.04', 'pkgname': 'postgresql-plpython-10', 'pkgver': '10.23-0ubuntu0.18.04.2+esm1'},
{'osver': '18.04', 'pkgname': 'postgresql-plpython3-10', 'pkgver': '10.23-0ubuntu0.18.04.2+esm1'},
{'osver': '18.04', 'pkgname': 'postgresql-pltcl-10', 'pkgver': '10.23-0ubuntu0.18.04.2+esm1'},
{'osver': '18.04', 'pkgname': 'postgresql-server-dev-10', 'pkgver': '10.23-0ubuntu0.18.04.2+esm1'}
];
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_HOLE,
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, 'libecpg-compat3 / libecpg-dev / libecpg6 / libpgtypes3 / libpq-dev / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
canonical | ubuntu_linux | 18.04 | cpe:/o:canonical:ubuntu_linux:18.04:-:esm |
canonical | ubuntu_linux | libecpg-compat3 | p-cpe:/a:canonical:ubuntu_linux:libecpg-compat3 |
canonical | ubuntu_linux | libecpg-dev | p-cpe:/a:canonical:ubuntu_linux:libecpg-dev |
canonical | ubuntu_linux | libecpg6 | p-cpe:/a:canonical:ubuntu_linux:libecpg6 |
canonical | ubuntu_linux | libpgtypes3 | p-cpe:/a:canonical:ubuntu_linux:libpgtypes3 |
canonical | ubuntu_linux | libpq-dev | p-cpe:/a:canonical:ubuntu_linux:libpq-dev |
canonical | ubuntu_linux | libpq5 | p-cpe:/a:canonical:ubuntu_linux:libpq5 |
canonical | ubuntu_linux | postgresql-10 | p-cpe:/a:canonical:ubuntu_linux:postgresql-10 |
canonical | ubuntu_linux | postgresql-client-10 | p-cpe:/a:canonical:ubuntu_linux:postgresql-client-10 |
canonical | ubuntu_linux | postgresql-plperl-10 | p-cpe:/a:canonical:ubuntu_linux:postgresql-plperl-10 |
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.6 High
AI Score
Confidence
High
0.015 Low
EPSS
Percentile
86.7%