IBM SECURITY ADVISORY
First Issued: Thu Jan 19 13:15:23 CST 2023
The most recent version of this document is available here:
http://aix.software.ibm.com/aix/efixes/powersc/security/curl_advisory9.asc
https://aix.software.ibm.com/aix/efixes/powersc/security/curl_advisory9.asc
ftp://aix.software.ibm.com/aix/efixes/powersc/security/curl_advisory9.asc
Security Bulletin: Multiple vulnerabilities in Curl affect PowerSC
===============================================================================
SUMMARY:
There are multiple vulnerabilities in Curl that affect PowerSC.
===============================================================================
VULNERABILITY DETAILS:
CVEID: CVE-2022-32206
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-32206
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-32206
DESCRIPTION: cURL libcurl is vulnerable to a denial of service, caused by
a flaw in the number of acceptable "links" in the "chained" HTTP
compression algorithms. By persuading a victim to connect a
specially-crafted server, a remote attacker could exploit this
vulnerability to insert a virtually unlimited number of compression
steps, and results in a denial of service condition.
CVSS Base score: 4.3
CVSS Temporal Score: See:
https://exchange.xforce.ibmcloud.com/vulnerabilities/229740
for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)
CVEID: CVE-2022-32207
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-32207
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-32207
DESCRIPTION: cURL libcurl could allow a remote attacker to obtain
sensitive information, caused by improper preservation of permissions
when saving cookies, alt-svc and hsts data to local files. By sending
a specially-crafted request, an attacker could exploit this
vulnerability to obtain sensitive information, and use this
information to launch further attacks against the affected system.
CVSS Base score: 7.5
CVSS Temporal Score: See:
https://exchange.xforce.ibmcloud.com/vulnerabilities/229741
for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
CVEID: CVE-2022-32208
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-32208
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-32208
DESCRIPTION: cURL libcurl is vulnerable to a man-in-the-middle attack,
caused by a flaw in the handling of message verification failures. An
attacker could exploit this vulnerability to launch a man-in-the-middle
attack and gain access to the communication channel between endpoints
to inject data to the client.
CVSS Base score: 3.5
CVSS Temporal Score: See:
https://exchange.xforce.ibmcloud.com/vulnerabilities/229742
for the current score.
CVSS Vector: (CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N)
CVEID: CVE-2022-32205
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-32205
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-32205
DESCRIPTION: cURL libcurl is vulnerable to a denial of service, caused by
an issue with the ability to set excessive amounts of Set-Cookie:
headers in a HTTP response to curl by a server. By persuading a victim
to connect a specially-crafted server, a remote attacker could exploit
this vulnerability to create requests that become larger than the
threshold, and results in a denial of service condition.
CVSS Base score: 4.3
CVSS Temporal Score: See:
https://exchange.xforce.ibmcloud.com/vulnerabilities/229739
for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)
CVEID: CVE-2022-35252
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-35252
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-35252
DESCRIPTION: cURL libcurl is vulnerable to a denial of service, caused by
a flaw when cookies contain control codes are later sent back to an
HTTP(S) server. By sending a specially-crafted request, a remote
attacker could exploit this vulnerability to cause a "sister site" to
deny service to siblings.
CVSS Base score: 5.3
CVSS Temporal Score: See:
https://exchange.xforce.ibmcloud.com/vulnerabilities/234980
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
The vulnerabilities in the following filesets are being addressed:
key_fileset = powerscStd.tnc_pm
key_fileset = curl-7.85.0-1.aix7.1.ppc.rpm
Fileset Lower Level Upper Level KEY
---------------------------------------------------------------
powerscStd.tnc_pm 1.3.0.4 2.1.0.4 key_w_fs
curl-7.85.0-1.aix7.1.ppc.rpm 7.19.4 7.83.1 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:
A. FIXES
Fixes are available.
The fixes can be downloaded via ftp or http from:
ftp://aix.software.ibm.com/aix/efixes/powersc/security/curl_fix9.tar
http://aix.software.ibm.com/aix/efixes/powersc/security/curl_fix9.tar
https://aix.software.ibm.com/aix/efixes/powersc/security/curl_fix9.tar
The link above is to a tar file containing this signed
advisory, open source fix packages, and OpenSSL signatures for each
package.
To extract the fixes from the tar file:
tar xvf curl_fix9.tar
cd curl_fix9
Verify you have retrieved the fixes intact:
The checksums below were generated using the
"openssl dgst -sha256 [filename]" command as the following:
openssl dgst -sha256 filename KEY
------------------------------------------------------------------------------------------------------------------------
77a5e41cca844667283272b571317056f79302d983d75c627bbeaca5d3845172 curl-7.85.0-1.aix7.1.ppc.rpm key_w_csum
These sums should match exactly. The OpenSSL signatures in the tar
file and on this advisory can also be used to verify the
integrity of the fixes. If the sums or signatures cannot be
confirmed, contact IBM Support.
openssl dgst -sha256 -verify [pubkey_file] -signature [advisory_file].sig [advisory_file]
openssl dgst -sha256 -verify [pubkey_file] -signature [ifix_file].sig [ifix_file]
Published advisory OpenSSL signature file location:
http://aix.software.ibm.com/aix/efixes/powersc/security/curl_advisory9.asc.sig
https://aix.software.ibm.com/aix/efixes/powersc/security/curl_advisory9.asc.sig
ftp://aix.software.ibm.com/aix/efixes/powersc/security/curl_advisory9.asc.sig
B. FIX AND INTERIM FIX INSTALLATION
IMPORTANT: If possible, it is recommended that a mksysb backup
of the system be created. Verify it is both bootable and
readable before proceeding.
To extract the fixes from the tar file:
tar xvf curl_fix9.tar
cd curl_fix9
To install a fix package:
rpm -ivh *.rpm
rpm -Uvh *.rpm
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.
If you would like to receive PowerSC Security Advisories via email,
please visit "My Notifications":
http://www.ibm.com/support/mynotifications
https://www.ibm.com/support/mynotifications
Contact IBM Support for questions related to this announcement:
http://ibm.com/support/
https://ibm.com/support/
To obtain the OpenSSL public key that can be used to verify the
signed advisories and ifixes:
Download the key from our web page:
ftp://ftp.software.ibm.com/systems/power/AIX/systems_p_os_aix_security_pubkey.txt
Please contact your local IBM AIX support center for any
assistance.
REFERENCES:
Complete CVSS v3 Guide: http://www.first.org/cvss/user-guide
https://www.first.org/cvss/user-guide
On-line Calculator v3:
http://www.first.org/cvss/calculator/3.0
https://www.first.org/cvss/calculator/3.0
ACKNOWLEDGEMENTS:
None.
CHANGE HISTORY:
First Issued: Thu Jan 19 13:15:23 CST 2023
===============================================================================
*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.