CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
AI Score
Confidence
High
The version of openssl installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-5535 advisory.
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 80900
##
# (C) Tenable, Inc.
##
include('compat.inc');
if (description)
{
script_id(204817);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/09/12");
script_cve_id("CVE-2024-5535");
script_name(english:"CBL Mariner 2.0 Security Update: openssl (CVE-2024-5535)");
script_set_attribute(attribute:"synopsis", value:
"The remote CBL Mariner host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The version of openssl installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore,
affected by a vulnerability as referenced in the CVE-2024-5535 advisory.
- Issue summary: Calling the OpenSSL API function SSL_select_next_proto with an empty supported client
protocols buffer May cause a crash or memory contents to be sent to the peer. Impact summary: A buffer
overread can have a range of potential consequences such as unexpected application beahviour or a crash.
In particular this issue could result in up to 255 bytes of arbitrary private data from memory being sent
to the peer leading to a loss of confidentiality. However, only applications that directly call the
SSL_select_next_proto function with a 0 length list of supported client protocols are affected by this
issue. This would normally never be a valid scenario and is typically not under attacker control but may
occur by accident in the case of a configuration or programming error in the calling application. The
OpenSSL API function SSL_select_next_proto is typically used by TLS applications that support ALPN
(Application Layer Protocol Negotiation) or NPN (Next Protocol Negotiation). NPN is older, was never
standardised and is deprecated in favour of ALPN. We believe that ALPN is significantly more widely
deployed than NPN. The SSL_select_next_proto function accepts a list of protocols from the server and a
list of protocols from the client and returns the first protocol that appears in the server list that also
appears in the client list. In the case of no overlap between the two lists it returns the first item in
the client list. In either case it will signal whether an overlap between the two lists was found. In the
case where SSL_select_next_proto is called with a zero length client list it fails to notice this
condition and returns the memory immediately following the client list pointer (and reports that there was
no overlap in the lists). This function is typically called from a server side application callback for
ALPN or a client side application callback for NPN. In the case of ALPN the list of protocols supplied by
the client is guaranteed by libssl to never be zero in length. The list of server protocols comes from the
application and should never normally be expected to be of zero length. In this case if the
SSL_select_next_proto function has been called as expected (with the list supplied by the client passed in
the client/client_len parameters), then the application will not be vulnerable to this issue. If the
application has accidentally been configured with a zero length server list, and has accidentally passed
that zero length server list in the client/client_len parameters, and has additionally failed to correctly
handle a no overlap response (which would normally result in a handshake failure in ALPN) then it will
be vulnerable to this problem. In the case of NPN, the protocol permits the client to opportunistically
select a protocol when there is no overlap. OpenSSL returns the first client protocol in the no overlap
case in support of this. The list of client protocols comes from the application and should never normally
be expected to be of zero length. However if the SSL_select_next_proto function is accidentally called
with a client_len of 0 then an invalid memory pointer will be returned instead. If the application uses
this output as the opportunistic protocol then the loss of confidentiality will occur. This issue has been
assessed as Low severity because applications are most likely to be vulnerable if they are using NPN
instead of ALPN - but NPN is not widely used. It also requires an application configuration or programming
error. Finally, this issue would not typically be under attacker control making active exploitation
unlikely. The FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue. Due to the low
severity of this issue we are not issuing new releases of OpenSSL at this time. The fix will be included
in the next releases when they become available. (CVE-2024-5535)
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://nvd.nist.gov/vuln/detail/CVE-2024-5535");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:N/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:N/UI:N/S:U/C:H/I:N/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-2024-5535");
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:"2024/06/26");
script_set_attribute(attribute:"patch_publication_date", value:"2024/07/09");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/07/27");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:microsoft:cbl-mariner:openssl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:microsoft:cbl-mariner:openssl-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:microsoft:cbl-mariner:openssl-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:microsoft:cbl-mariner:openssl-perl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:microsoft:cbl-mariner:openssl-static");
script_set_attribute(attribute:"cpe", value:"x-cpe:/o:microsoft:cbl-mariner");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"MarinerOS Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/CBLMariner/release", "Host/CBLMariner/rpm-list", "Host/cpu");
exit(0);
}
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var release = get_kb_item('Host/CBLMariner/release');
if (isnull(release) || 'CBL-Mariner' >!< release) audit(AUDIT_OS_NOT, 'CBL-Mariner');
var os_ver = pregmatch(pattern: "CBL-Mariner ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'CBL-Mariner');
os_ver = os_ver[1];
if (! preg(pattern:"^2([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'CBL-Mariner 2.0', 'CBL-Mariner ' + os_ver);
if (!get_kb_item('Host/CBLMariner/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu)
audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'CBL-Mariner', cpu);
var pkgs = [
{'reference':'openssl-1.1.1k-35.cm2', 'cpu':'x86_64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-1.1.1k-35.cm2', 'cpu':'aarch64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-devel-1.1.1k-35.cm2', 'cpu':'x86_64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-devel-1.1.1k-35.cm2', 'cpu':'aarch64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-libs-1.1.1k-35.cm2', 'cpu':'x86_64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-libs-1.1.1k-35.cm2', 'cpu':'aarch64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-perl-1.1.1k-35.cm2', 'cpu':'x86_64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-perl-1.1.1k-35.cm2', 'cpu':'aarch64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-static-1.1.1k-35.cm2', 'cpu':'x86_64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-static-1.1.1k-35.cm2', 'cpu':'aarch64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE}
];
var flag = 0;
foreach var package_array ( pkgs ) {
var reference = NULL;
var _release = NULL;
var sp = NULL;
var _cpu = NULL;
var el_string = NULL;
var rpm_spec_vers_cmp = NULL;
var epoch = NULL;
var allowmaj = NULL;
var exists_check = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = 'CBLMariner-' + package_array['release'];
if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : rpm_report_get()
);
exit(0);
}
else
{
var tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'openssl / openssl-devel / openssl-libs / openssl-perl / etc');
}