CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
98.4%
The remote Rocky Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2023:5738 advisory.
Extremely large RSA keys in certificate chains can cause a client/server to expend significant CPU time verifying signatures. With fix, the size of RSA keys transmitted during handshakes is restricted to <= 8192 bits. Based on a survey of publicly trusted RSA keys, there are currently only three certificates in circulation with keys larger than this, and all three appear to be test certificates that are not actively deployed. It is possible there are larger keys in use in private PKIs, but we target the web PKI, so causing breakage here in the interests of increasing the default safety of users of crypto/tls seems reasonable. (CVE-2023-29409)
A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing. With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection. This issue is also fixed in golang.org/x/net/http2 for users manually configuring HTTP/2. The default stream concurrency limit is 250 streams (requests) per HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the Server.MaxConcurrentStreams setting and the ConfigureServer function. (CVE-2023-39325)
The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023. (CVE-2023-44487)
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 package checks in this plugin were extracted from
# Rocky Linux Security Advisory RLSA-2023:5738.
##
include('compat.inc');
if (description)
{
script_id(183815);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/09");
script_cve_id("CVE-2023-29409", "CVE-2023-39325", "CVE-2023-44487");
script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2023/10/31");
script_xref(name:"IAVB", value:"2023-B-0064-S");
script_xref(name:"RLSA", value:"2023:5738");
script_xref(name:"IAVB", value:"2023-B-0080-S");
script_xref(name:"CEA-ID", value:"CEA-2024-0004");
script_name(english:"Rocky Linux 9 : go-toolset and golang (RLSA-2023:5738)");
script_set_attribute(attribute:"synopsis", value:
"The remote Rocky Linux host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Rocky Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the
RLSA-2023:5738 advisory.
- Extremely large RSA keys in certificate chains can cause a client/server to expend significant CPU time
verifying signatures. With fix, the size of RSA keys transmitted during handshakes is restricted to <=
8192 bits. Based on a survey of publicly trusted RSA keys, there are currently only three certificates in
circulation with keys larger than this, and all three appear to be test certificates that are not actively
deployed. It is possible there are larger keys in use in private PKIs, but we target the web PKI, so
causing breakage here in the interests of increasing the default safety of users of crypto/tls seems
reasonable. (CVE-2023-29409)
- A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive
server resource consumption. While the total number of requests is bounded by the
http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create
a new request while the existing one is still executing. With the fix applied, HTTP/2 servers now bound
the number of simultaneously executing handler goroutines to the stream concurrency limit
(MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client
has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows
too large, the server will terminate the connection. This issue is also fixed in golang.org/x/net/http2
for users manually configuring HTTP/2. The default stream concurrency limit is 250 streams (requests) per
HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the
Server.MaxConcurrentStreams setting and the ConfigureServer function. (CVE-2023-39325)
- The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation
can reset many streams quickly, as exploited in the wild in August through October 2023. (CVE-2023-44487)
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://errata.rockylinux.org/RLSA-2023:5738");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2228743");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2242803");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2243296");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-44487");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2023/08/02");
script_set_attribute(attribute:"patch_publication_date", value:"2023/10/24");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/10/24");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:go-toolset");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:golang");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:golang-bin");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:golang-docs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:golang-misc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:golang-src");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:golang-tests");
script_set_attribute(attribute:"cpe", value:"cpe:/o:rocky:linux:9");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Rocky Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2023-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/RockyLinux/release", "Host/RockyLinux/rpm-list", "Host/cpu");
exit(0);
}
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RockyLinux/release');
if (isnull(os_release) || 'Rocky Linux' >!< os_release) audit(AUDIT_OS_NOT, 'Rocky Linux');
var os_ver = pregmatch(pattern: "Rocky(?: Linux)? release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Rocky Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^9([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Rocky Linux 9.x', 'Rocky Linux ' + os_ver);
if (!get_kb_item('Host/RockyLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Rocky Linux', cpu);
var pkgs = [
{'reference':'go-toolset-1.19.13-1.el9_2', 'cpu':'s390x', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'golang-1.19.13-1.el9_2', 'cpu':'s390x', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'golang-bin-1.19.13-1.el9_2', 'cpu':'s390x', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'golang-docs-1.19.13-1.el9_2', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'golang-misc-1.19.13-1.el9_2', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'golang-src-1.19.13-1.el9_2', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'golang-tests-1.19.13-1.el9_2', 'release':'9', '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 = 'Rocky-' + 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, 'go-toolset / golang / golang-bin / golang-docs / golang-misc / etc');
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-29409
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-39325
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-44487
bugzilla.redhat.com/show_bug.cgi?id=2228743
bugzilla.redhat.com/show_bug.cgi?id=2242803
bugzilla.redhat.com/show_bug.cgi?id=2243296
errata.rockylinux.org/RLSA-2023:5738
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
98.4%