Security Bulletin
Summary
There are vulnerabilities in Curl that affect PowerSC.
Vulnerability Details
CVEID: CVE-2020-8169
DESCRIPTION: cURL libcurl could allow a remote attacker to obtain sensitive information, caused by the failure to correctly URL encode the credential data when set using an curl_easy_setopt option. The host name and partial password is leaked in cleartext over DNS on HTTP redirect. An attacker could exploit this vulnerability to obtain sensitive information.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/183930 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
CVEID: CVE-2020-8177
DESCRIPTION: cURL could allow a remote attacker to overwrite arbitrary files on the system, caused by the improper handling of certain parameters when using -J (--remote-header-name) and -I (--include) in the same command line. An attacker could exploit this vulnerability to overwrite a local file.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/183931 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)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| PowerSC | 1.2 |
| PowerSC | 1.3 |
The vulnerabilities in the following filesets are being addressed:
| Fileset | Lower Level | Upper Level |
|
powerscStd.tnc_pm | 1.2.0.3 | 1.3.0.3 |
|
curl-7.71.1-1.aix6.1.ppc.rpm | 7.19.4 | 7.67.0 |
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
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_fix3.tar
http://aix.software.ibm.com/aix/efixes/powersc/security/curl_fix3.tar
https://aix.software.ibm.com/aix/efixes/powersc/security/curl_fix3.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_fix3.tar
cd curl_fix3
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 |
|
6a7827faa2b0a247836d2b45943e7c876998f12114d2cc4320f568236a79987b |
ca-certificates-2020.06.01-1.aix6.1.ppc.rpm |
|
42ac6e7c33d4363e4c9ae92034e10840f5fdfdf84a286e4ab5ecac7ccce248a0 |
curl-7.71.1-1.aix6.1.ppc.rpm |
|
1949d8fa59f30465473bcb5053ea96b242393e0c7175eeb91d588676600ea5ff |
cyrus-sasl-2.1.26-3.aix6.1.ppc.rpm |
|
2a85b8024e1aaff3f15962ac2fce4531b48500ce0bc3a8af3ada53ee0ec5706b |
krb5-libs-1.16.1-4.aix6.1.ppc.rpm |
|
655c09fa903f6adea25447c9d7df3e7e85f36d42d433538c66e381f34aa55913 |
libgcc-8.3.0-2.aix7.2.ppc.rpm |
|
c93fe122f2cde9e33110be0f36b24596a64222cd45457b106f2791a3f7aab672 |
libnghttp2-1.41.0-1.aix6.1.ppc.rpm |
|
22a9a3b7b4cbdc37f1e20afba3f0f09e0f6030644ae387bc6bc7e639ba07180f |
libssh2-1.9.0-1.aix6.1.ppc.rpm |
|
98ece9b9ad9e4a3e78ec153725915aa17a6876bf5b0b42bdfd33ad1de55a63e4 |
openldap-2.4.50-1.aix6.1.ppc.rpm |
|
05061bbe92afc0833b91986280f6c389a04f626db8a61d4497528833df79b511 |
openssl-1.0.2.2100.tar.Z |
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 -sha1 -verify <pubkey_file> -signature <advisory_file>.sig <advisory_file>
openssl dgst -sha1 -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_advisory3.asc.sig
https://aix.software.ibm.com/aix/efixes/powersc/security/curl_advisory3.asc.sig
ftp://aix.software.ibm.com/aix/efixes/powersc/security/curl_advisory3.a…
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_fix3.tar
cd curl_fix3
To install a fix package:
rpm -ivh *.rpm
rpm -Uvh *.rpm
Interim fixes have had limited functional and regression testing but not the full regression testing that takes place for Service Packs; however, IBM does fully support them.
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
Change History
23 Oct 2020: Initial Publication
*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
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
Document Location
Worldwide
Was this topic helpful?
Document Information
Modified date:
23 October 2020
UID
ibm16353035