5.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:N/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.5 High
AI Score
Confidence
High
0.069 Low
EPSS
Percentile
93.9%
The remote host is affected by the vulnerability described in GLSA-202405-08 (strongSwan: Multiple Vulnerabilities)
The in-memory certificate cache in strongSwan before 5.9.4 has a remote integer overflow upon receiving many requests with different certificates to fill the cache and later trigger the replacement of cache entries. The code attempts to select a less-often-used cache entry by means of a random number generator, but this is not done correctly. Remote code execution might be a slight possibility. (CVE-2021-41991)
In strongSwan before 5.9.5, a malicious responder can send an EAP-Success message too early without actually authenticating the client and (in the case of EAP methods with mutual authentication and EAP-only authentication for IKEv2) even without server authentication. (CVE-2021-45079)
strongSwan before 5.9.8 allows remote attackers to cause a denial of service in the revocation plugin by sending a crafted end-entity (and intermediate CA) certificate that contains a CRL/OCSP URL that points to a server (under the attacker’s control) that doesn’t properly respond but (for example) just does nothing after the initial TCP handshake, or sends an excessive amount of application data. (CVE-2022-40617)
strongSwan 5.9.8 and 5.9.9 potentially allows remote code execution because it uses a variable named public for two different purposes within the same function. There is initially incorrect access control, later followed by an expired pointer dereference. One attack vector is sending an untrusted client certificate during EAP-TLS. A server is affected only if it loads plugins that implement TLS-based EAP methods (EAP-TLS, EAP-TTLS, EAP-PEAP, or EAP-TNC). This is fixed in 5.9.10. (CVE-2023-26463)
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.
#
# @NOAGENT@
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 202405-08.
#
# The advisory text is Copyright (C) 2001-2021 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#
include('compat.inc');
if (description)
{
script_id(194978);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/04");
script_cve_id(
"CVE-2021-41991",
"CVE-2021-45079",
"CVE-2022-40617",
"CVE-2023-26463"
);
script_name(english:"GLSA-202405-08 : strongSwan: Multiple Vulnerabilities");
script_set_attribute(attribute:"synopsis", value:
"");
script_set_attribute(attribute:"description", value:
"The remote host is affected by the vulnerability described in GLSA-202405-08 (strongSwan: Multiple Vulnerabilities)
- The in-memory certificate cache in strongSwan before 5.9.4 has a remote integer overflow upon receiving
many requests with different certificates to fill the cache and later trigger the replacement of cache
entries. The code attempts to select a less-often-used cache entry by means of a random number generator,
but this is not done correctly. Remote code execution might be a slight possibility. (CVE-2021-41991)
- In strongSwan before 5.9.5, a malicious responder can send an EAP-Success message too early without
actually authenticating the client and (in the case of EAP methods with mutual authentication and EAP-only
authentication for IKEv2) even without server authentication. (CVE-2021-45079)
- strongSwan before 5.9.8 allows remote attackers to cause a denial of service in the revocation plugin by
sending a crafted end-entity (and intermediate CA) certificate that contains a CRL/OCSP URL that points to
a server (under the attacker's control) that doesn't properly respond but (for example) just does nothing
after the initial TCP handshake, or sends an excessive amount of application data. (CVE-2022-40617)
- strongSwan 5.9.8 and 5.9.9 potentially allows remote code execution because it uses a variable named
public for two different purposes within the same function. There is initially incorrect access control,
later followed by an expired pointer dereference. One attack vector is sending an untrusted client
certificate during EAP-TLS. A server is affected only if it loads plugins that implement TLS-based EAP
methods (EAP-TLS, EAP-TTLS, EAP-PEAP, or EAP-TNC). This is fixed in 5.9.10. (CVE-2023-26463)
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://security.gentoo.org/glsa/202405-08");
script_set_attribute(attribute:"see_also", value:"https://bugs.gentoo.org/show_bug.cgi?id=818841");
script_set_attribute(attribute:"see_also", value:"https://bugs.gentoo.org/show_bug.cgi?id=832460");
script_set_attribute(attribute:"see_also", value:"https://bugs.gentoo.org/show_bug.cgi?id=878887");
script_set_attribute(attribute:"see_also", value:"https://bugs.gentoo.org/show_bug.cgi?id=899964");
script_set_attribute(attribute:"solution", value:
"All strongSwan users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose >=net-vpn/strongswan-5.9.10");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:P");
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: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-2021-45079");
script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2023-26463");
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:"2021/10/18");
script_set_attribute(attribute:"patch_publication_date", value:"2024/05/04");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/05/04");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:strongswan");
script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Gentoo 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/Gentoo/release", "Host/Gentoo/qpkg-list");
exit(0);
}
include('qpkg.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item('Host/Gentoo/release')) audit(AUDIT_OS_NOT, 'Gentoo');
if (!get_kb_item('Host/Gentoo/qpkg-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var flag = 0;
var packages = [
{
'name' : 'net-vpn/strongswan',
'unaffected' : make_list("ge 5.9.10"),
'vulnerable' : make_list("lt 5.9.10")
}
];
foreach var package( packages ) {
if (isnull(package['unaffected'])) package['unaffected'] = make_list();
if (isnull(package['vulnerable'])) package['vulnerable'] = make_list();
if (qpkg_check(package: package['name'] , unaffected: package['unaffected'], vulnerable: package['vulnerable'])) flag++;
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : qpkg_report_get()
);
exit(0);
}
else
{
qpkg_tests = list_uniq(qpkg_tests);
var tested = qpkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'strongSwan');
}
Vendor | Product | Version | CPE |
---|---|---|---|
gentoo | linux | strongswan | p-cpe:/a:gentoo:linux:strongswan |
gentoo | linux | cpe:/o:gentoo:linux |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41991
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45079
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-40617
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-26463
bugs.gentoo.org/show_bug.cgi?id=818841
bugs.gentoo.org/show_bug.cgi?id=832460
bugs.gentoo.org/show_bug.cgi?id=878887
bugs.gentoo.org/show_bug.cgi?id=899964
security.gentoo.org/glsa/202405-08
5.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:N/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.5 High
AI Score
Confidence
High
0.069 Low
EPSS
Percentile
93.9%