IBM SECURITY ADVISORY
First Issued: Fri Jun 28 12:07:38 CDT 2024
The most recent version of this document is available here:
https://aix.software.ibm.com/aix/efixes/powersc/security/curl_advisory15.asc
Security Bulletin: PowerSC is vulnerable to security restrictions bypass
and denial of service due to Curl
===============================================================================
SUMMARY:
Vulnerabilities in Curl could allow a remote attacker to bypass security
restrictions (CVE-2024-2466, CVE-2024-2004, CVE-2024-2379) or cause a
denial of service (CVE-2024-2398). PowerSC uses Curl as part of PowerSC
Trusted Network Connect (TNC).
===============================================================================
VULNERABILITY DETAILS:
CVEID: CVE-2024-2466
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-2466
DESCRIPTION: cURL libcurl could allow a remote attacker to bypass security
restrictions, caused by a flaw when built to use mbedTLS. By sending a
specially crafted request, an attacker could exploit this
vulnerability to bypass TLS certificate check.
CVSS Base score: 5.3
CVSS Temporal Score: See:
https://exchange.xforce.ibmcloud.com/vulnerabilities/286431
for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
CVEID: CVE-2024-2004
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-2004
DESCRIPTION: cURL libcurl could allow a local attacker to bypass security
restrictions, caused by a flaw in the logic for removing protocols. By
sending a specially crafted request, an attacker could exploit this
vulnerability to use the disabled set of protocols.
CVSS Base score: 3.7
CVSS Temporal Score: See:
https://exchange.xforce.ibmcloud.com/vulnerabilities/286427
for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N)
CVEID: CVE-2024-2379
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-2379
DESCRIPTION: cURL libcurl could allow a remote attacker to bypass security
restrictions, caused by a flaw when wolfSSL library was built with the
OPENSSL_COMPATIBLE_DEFAULTS symbol set. By sending a specially-crafted
request, an attacker could exploit this vulnerability to bypass
certificate verification for a QUIC connection.
CVSS Base score: 3.7
CVSS Temporal Score: See:
https://exchange.xforce.ibmcloud.com/vulnerabilities/286429
for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N)
CVEID: CVE-2024-2398
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-2398
DESCRIPTION: cURL libcurl is vulnerable to a denial of service, caused by
a memory leak when allowing HTTP/2 server push. By sending a specially
crafted PUSH_PROMISE frames with an excessive amount of headers, a
remote attacker could exploit this vulnerability to cause a denial of
service condition.
CVSS Base score: 5.3
CVSS Temporal Score: See:
https://exchange.xforce.ibmcloud.com/vulnerabilities/286430
for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
AFFECTED PRODUCTS AND VERSIONS:
PowerSC 1.3, 2.0, 2.1, 2.2
The vulnerabilities in the following filesets are being addressed:
key_fileset = powerscStd.tnc_pm
key_fileset = curl-8.7.1-1.aix7.1.ppc.rpm
Fileset Lower Level Upper Level KEY
---------------------------------------------------------------
powerscStd.tnc_pm 1.3.0.4 2.2.0.2 key_w_fs
curl-8.7.1-1.aix7.1.ppc.rpm 7.19.4 8.6.0 key_w_fs
Note: To find out whether the affected PowerSC filesets are installed
on your systems, refer to the lslpp command found in AIX user's guide.
To find out whether the affected curl filesets are installed on your
systems, refer to the rpm command found in AIX user's guide.
Example: lslpp -l | grep powerscStd
Example: rpm -qa | grep curl
REMEDIATION:
FIXES
IBM strongly recommends addressing the vulnerability now.
Fixes are available.
The fixes can be downloaded via yum:
To install any dependencies along with the fix package:
yum update curl
WORKAROUNDS AND MITIGATIONS:
None.
===============================================================================
CONTACT US:
Note: Keywords labeled as KEY in this document are used for parsing
purposes.
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Download the key from our web page:
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Please contact your local IBM AIX support center for any
assistance.
REFERENCES:
Complete CVSS v3 Guide:
https://www.first.org/cvss/user-guide
On-line Calculator v3:
https://www.first.org/cvss/calculator/3.0
ACKNOWLEDGEMENTS:
None.
CHANGE HISTORY:
First Issued: Fri Jun 28 12:07:38 CDT 2024
===============================================================================
*The CVSS Environment Score is customer environment specific and will
ultimately impact the Overall CVSS Score. Customers can evaluate the impact
of this vulnerability in their environments by accessing the links in the
Reference section of this Security Bulletin.
Disclaimer
According to the Forum of Incident Response and Security Teams (FIRST), the
Common Vulnerability Scoring System (CVSS) is an "industry open standard
designed to convey vulnerability severity and help to determine urgency and
priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY
OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT
OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.