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
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.006 Low
EPSS
Percentile
77.4%
There are multiple vulnerabilities in Curl that affect PowerSC.
CVEID:CVE-2022-42916
**DESCRIPTION:**cURL libcurl could allow a remote attacker to obtain sensitive information, caused by a HSTS bypass flaw . By sending a specially-crafted URL with ASCII counterparts as part of the IDN conversion in host name, an attacker could exploit this vulnerability to obtain sensitive information from clear-text HTTP transmission, 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/239061 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-2022-32221
**DESCRIPTION:**cURL libcurl could allow a remote attacker to bypass security restrictions, caused by a flaw when using the read callback (CURLOPT_READFUNCTION) to ask for data to send. By sending a specially-crafted request, an attacker could exploit this vulnerability to send wrong data or doing a use-after-free is not present in libcurl code.
CVSS Base score: 8.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/239058 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L)
CVEID:CVE-2022-35260
**DESCRIPTION:**cURL libcurl is vulnerable to a denial of service, caused by a stack-based buffer overflow. By persuading a victim to open a specially-crafted netrc file, a remote attacker could exploit this vulnerability to cause a segfault, and results in a denial of service condition.
CVSS Base score: 5.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/239059 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
CVEID:CVE-2022-42915
**DESCRIPTION:**cURL libcurl is vulnerable to a denial of service, caused by a double-free flaw in the error/cleanup handling. By sending a specially-crafted CONNECT request, a remote attacker could exploit this vulnerability to cause HTTP proxy to refuse the request, and results in a denial of service condition.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/239060 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Affected Product(s) | Version(s) |
---|---|
PowerSC | All |
The vulnerabilities in the following filesets are being addressed:
Fileset | Lower Level | Upper Level |
---|---|---|
powerscStd.tnc_pm | 1.3.0.4 | 2.1.0.4 |
curl-7.85.0-1.aix7.1.ppc.rpm | 7.19.4 | 7.85.0 |
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
A. FIXES
IBM strongly recommends addressing the vulnerability now.
Fixes are available.
The fixes can be downloaded via ftp or http from:
<https://aix.software.ibm.com/aix/efixes/powersc/security/curl_fix10.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_fix10.tar
cd curl_fix10
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 |
---|---|
8dab3346982240ad4136763e9b2bc33e81a7f0a3a06cd5ba4bce84fa3adaf7cd | curl-7.86.0-1.aix7.1.ppc.rpm |
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:
<https://aix.software.ibm.com/aix/efixes/powersc/security/curl_advisory10.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_fix10.tar
cd curl_fix10
To install a fix package:
rpm -ivh *.rpm
rpm -Uvh *.rpm
To install any dependencies along with the fix package:
yum update curl
None
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
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.006 Low
EPSS
Percentile
77.4%