CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
9.0%
A vulnerability in the AIX invscout command could allow a non-privileged local user to execute arbitrary commands (CVE-2024-27260).
CVEID:CVE-2024-27260
**DESCRIPTION:**IBM AIX could allow a non-privileged local user to exploit a vulnerability in the invscout command to execute arbitrary commands.
CVSS Base score: 8.4
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/283985 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Affected Product(s) | Version(s) |
---|---|
AIX | 7.2 |
AIX | 7.3 |
VIOS | 3.1 |
VIOS | 4.1 |
The following fileset levels are vulnerable:
Fileset | Lower Level | Upper Level |
---|---|---|
invscout.rte | 2.2.0.0 | 2.2.0.26 |
To find out whether the affected filesets are installed on your systems, refer to the lslpp command found in AIX user’s guide.
Example: lslpp -L | grep -i invscout.rte
A. FIXES
IBM strongly recommends addressing the vulnerability now.
AIX and VIOS fixes are available. The AIX and VIOS fixes can be downloaded via https from:
<https://aix.software.ibm.com/aix/efixes/security/invscout_fix6.tar>
The link above is to a tar file containing this signed advisory, fix packages, and OpenSSL signatures for each package. The fixes below include prerequisite checking. This will enforce the correct mapping between the fixes and AIX Technology Levels.
The iFix has a prereq of invscout.rte fileset level 2.2.0.25, which is available from:
<https://aix.software.ibm.com/aix/efixes/security/invscout_fix5.tar>
AIX Level | Interim Fix | Fileset Name(prereq for installation) |
---|---|---|
7.2, 7.3 | is22026s1a.240514.epkg.Z | invscout.rte(2.2.0.25) |
VIOS Level | Interim Fix | Fileset Name(prereq for installation) |
---|---|---|
3.1, 4.1 | is22026s1a.240514.epkg.Z | invscout.rte(2.2.0.25) |
To extract the fixes from the tar file:
tar xvf invscout_fix6.tar
cd invscout_fix6
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 |
---|---|
1166b60febfa2e6372431a807de5296e9c7fa4b0892ad62530553a6e05bec710 | is22026s1a.240514.epkg.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 at <http://ibm.com/support/> and describe the discrepancy.
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/security/invscout_advisory6.asc.sig>
B. FIX INSTALLATION
If possible, it is recommended that a mksysb backup of the system be created. Verify it is both bootable and readable before proceeding.
To preview a fix installation:
installp -a -d fix_name -p all # where fix_name is the name of the
To install a fix package:
installp -a -d fix_name -X all # where fix_name is the name of the
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.
Interim fix management documentation can be found at:
<https://www.ibm.com/support/pages/managing-interim-fixes-aix>
To preview an interim fix installation:
emgr -e ipkg_name -p # where ipkg_name is the name of the
To install an interim fix package:
emgr -e ipkg_name -X # where ipkg_name is the name of the
None
Vendor | Product | Version | CPE |
---|---|---|---|
ibm | aix | 7.2 | cpe:2.3:o:ibm:aix:7.2:*:*:*:*:*:*:* |
ibm | aix | 7.3 | cpe:2.3:o:ibm:aix:7.3:*:*:*:*:*:*:* |
ibm | powervm_virtual_i\/o_server | 3.1 | cpe:2.3:a:ibm:powervm_virtual_i\/o_server:3.1:*:*:*:*:*:*:* |
ibm | powervm_virtual_i\/o_server | 4.1 | cpe:2.3:a:ibm:powervm_virtual_i\/o_server:4.1:*:*:*:*:*:*:* |
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
9.0%