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IBMC207E67A161DCAD4AB55C0EDF567BC24DFC027D25920396DFCCE55EF3E7F1410

HistorySep 15, 2021 - 12:14 p.m.

Security Bulletin: Vulnerabilities in bellmail, caccelstat, iostat, lquerypv, restbyinode, and vmstat affect AIX (CVE-2017-1692)

2021-09-1512:14:52

www.ibm.com

aix

vulnerability

privilege escalation

bellmail

caccelstat

iostat

lquerypv

restbyinode

vmstat

fileset levels

EPSS

Percentile

12.6%

JSON

Summary

There is a potential root privilege escalation vulnerability in bellmail, caccelstat, iostat, lquerypv, restbyinode, and vmstat on AIX.

Vulnerability Details

CVEID: CVE-2017-1692 **DESCRIPTION: **IBM AIX contains an unspecified vulnerability that would allow a locally authenticated user to obtain root level privileges. **CVSS Base Score: **8.4 **CVSS Temporal Score:**See <https://exchange.xforce.ibmcloud.com/vulnerabilities/134067> for the current score *CVSS Environmental Score:**Undefined CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

AIX 5.3, 6.1, 7.1, 7.2
VIOS 2.2.x

The following fileset levels are vulnerable:

key_fileset = aix

For bellmail:

Fileset Lower Level Upper Level KEY
------------------------------------------------------------
bos.net.tcp.client 6.1.9.0 6.1.9.201 key_w_fs
bos.net.tcp.client 7.1.4.0 7.1.4.32 key_w_fs
bos.net.tcp.client_core 7.2.0.0 7.2.0.4 key_w_fs
bos.net.tcp.client_core 7.2.1.0 7.2.1.2 key_w_fs

For caccelstat:

Fileset Lower Level Upper Level KEY
------------------------------------------------------------
bos.acct 7.2.0.0 7.2.0.2 key_w_fs
bos.acct 7.2.1.0 7.2.1.0 key_w_fs

For iostat:

Fileset Lower Level Upper Level KEY
------------------------------------------------------------
bos.acct 7.1.4.0 7.1.4.30 key_w_fs
bos.acct 7.2.0.0 7.2.0.3 key_w_fs
bos.acct 7.2.1.0 7.2.1.1 key_w_fs

For lquerypv:

Fileset Lower Level Upper Level KEY
------------------------------------------------------------
bos.rte.lvm 5.3.12.0 5.3.12.8 key_w_fs
bos.rte.lvm 6.1.9.0 6.1.9.201 key_w_fs
bos.rte.lvm 7.1.4.0 7.1.4.32 key_w_fs
bos.rte.lvm 7.2.0.0 7.2.0.4 key_w_fs
bos.rte.lvm 7.2.1.0 7.2.1.2 key_w_fs

For restbyinode:

Fileset Lower Level Upper Level KEY
------------------------------------------------------------
bos.rte.archive 5.3.12.0 5.3.12.7 key_w_fs
bos.rte.archive 6.1.9.0 6.1.9.201 key_w_fs
bos.rte.archive 7.1.4.0 7.1.4.31 key_w_fs
bos.rte.archive 7.2.0.0 7.2.0.3 key_w_fs
bos.rte.archive 7.2.1.0 7.2.1.1 key_w_fs

For vmstat:

Note: To find out whether the affected filesets are installed on your systems, refer to the lslpp command found in the AIX user’s guide.

Example: lslpp -L | grep -i bos.net.tcp.client

Remediation/Fixes

A. APARS

IBM has assigned the following APARs to this problem:

For bellmail:

AIX Level APAR SP KEY
-----------------------------------
6.1.9 IV97356 SP10 key_w_apar
7.1.4 IV99497 SP6 key_w_apar
7.2.0 IV99498 SP6 key_w_apar
7.2.1 IV99499 SP4 key_w_apar

For caccelstat:

AIX Level APAR SP KEY
-----------------------------------
7.2.0 IV97810 SP5 key_w_apar
7.2.1 IV97811 SP3 key_w_apar

For iostat:

AIX Level APAR SP KEY
-----------------------------------
7.1.4 IV97896 SP6 key_w_apar
7.2.0 IV97897 SP6 key_w_apar
7.2.1 IV97898 SP4 key_w_apar

For lquerypv:

AIX Level APAR SP KEY
-----------------------------------
5.3.12 IJ00951 N/A key_w_apar
6.1.9 IV99548 SP10 key_w_apar
7.1.4 IV99550 SP6 key_w_apar
7.2.0 IV99551 SP6 key_w_apar
7.2.1 IV99552 SP4 key_w_apar

For restbyinode:

AIX Level APAR SP KEY
-----------------------------------
5.3.12 IV98013 N/A key_w_apar
6.1.9 IV97852 SP10 key_w_apar
7.1.4 IV97957 SP6 key_w_apar
7.2.0 IV97959 SP6 key_w_apar
7.2.1 IV97958 SP4 key_w_apar

For vmstat:

AIX Level APAR SP KEY
-----------------------------------
7.1.4 IV97899 SP6 key_w_apar
7.2.0 IV97900 SP6 key_w_apar
7.2.1 IV97901 SP4 key_w_apar

** Please refer to AIX support lifecycle information page for availability of Service Packs
<http://www-01.ibm.com/support/docview.wss?uid=isg3T1012517>

Subscribe to the APARs here:

For bellmail:
<http://www.ibm.com/support/docview.wss?uid=isg1IV97356>
<https://www.ibm.com/support/docview.wss?uid=isg1IV97356>
<http://www.ibm.com/support/docview.wss?uid=isg1IV99497>
<https://www.ibm.com/support/docview.wss?uid=isg1IV99497>
<http://www.ibm.com/support/docview.wss?uid=isg1IV99498>
<https://www.ibm.com/support/docview.wss?uid=isg1IV99498>
<http://www.ibm.com/support/docview.wss?uid=isg1IV99499>
<https://www.ibm.com/support/docview.wss?uid=isg1IV99499>

For caccelstat:
<http://www.ibm.com/support/docview.wss?uid=isg1IV97810>
<https://www.ibm.com/support/docview.wss?uid=isg1IV97810>
<http://www.ibm.com/support/docview.wss?uid=isg1IV97811>
<https://www.ibm.com/support/docview.wss?uid=isg1IV97811>

For iostat:
<http://www.ibm.com/support/docview.wss?uid=isg1IV97896>
<https://www.ibm.com/support/docview.wss?uid=isg1IV97896>
<http://www.ibm.com/support/docview.wss?uid=isg1IV97898>
<https://www.ibm.com/support/docview.wss?uid=isg1IV97898>

For lquerypv:
<http://www.ibm.com/support/docview.wss?uid=isg1IJ00951>
<https://www.ibm.com/support/docview.wss?uid=isg1IJ00951>
<http://www.ibm.com/support/docview.wss?uid=isg1IV99548>
<https://www.ibm.com/support/docview.wss?uid=isg1IV99548>
<http://www.ibm.com/support/docview.wss?uid=isg1IV99550>
<https://www.ibm.com/support/docview.wss?uid=isg1IV99550>
<http://www.ibm.com/support/docview.wss?uid=isg1IV99551>
<https://www.ibm.com/support/docview.wss?uid=isg1IV99551>
<http://www.ibm.com/support/docview.wss?uid=isg1IV99552>
<https://www.ibm.com/support/docview.wss?uid=isg1IV99552>

For vmstat:
<http://www.ibm.com/support/docview.wss?uid=isg1IV97899>
<https://www.ibm.com/support/docview.wss?uid=isg1IV97899>
<http://www.ibm.com/support/docview.wss?uid=isg1IV97900>
<https://www.ibm.com/support/docview.wss?uid=isg1IV97900>
<http://www.ibm.com/support/docview.wss?uid=isg1IV97901>
<https://www.ibm.com/support/docview.wss?uid=isg1IV97901>

By subscribing, you will receive periodic email alerting you to the status of the APAR, and a link to download the fix once it becomes available.

B. FIXES

Fixes are available.

The fixes can be downloaded via ftp or http from:

<ftp://aix.software.ibm.com/aix/efixes/security/suid_fix.tar>
<http://aix.software.ibm.com/aix/efixes/security/suid_fix.tar>
<https://aix.software.ibm.com/aix/efixes/security/suid_fix.tar>

The links above are 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.

Please note that the below tables refer to AIX TL/SP level as opposed to fileset level, i.e., 6.1.9.9 is AIX 6100-09-09.

For bellmail:

AIX Level Interim Fix (*.Z) KEY PRODUCT(S)
----------------------------------------------------------
6.1.9.7 IV97356m9a.170830.epkg.Z key_w_fix bellmail
6.1.9.8 IV97356m9a.170830.epkg.Z key_w_fix bellmail
6.1.9.9 IV97356m9a.170830.epkg.Z key_w_fix bellmail
7.1.4.3 IV99497m5a.171115.epkg.Z key_w_fix bellmail
7.1.4.4 IV99497m5a.171115.epkg.Z key_w_fix bellmail
7.1.4.5 IV99497m5a.171115.epkg.Z key_w_fix bellmail
7.2.0.3 IV99498m5a.171115.epkg.Z key_w_fix bellmail
7.2.0.4 IV99498m5a.171115.epkg.Z key_w_fix bellmail
7.2.0.5 IV99498m5a.171115.epkg.Z key_w_fix bellmail
7.2.1.1 IV99499m3a.171115.epkg.Z key_w_fix bellmail
7.2.1.2 IV99499m3a.171115.epkg.Z key_w_fix bellmail
7.2.1.3 IV99499m3a.171115.epkg.Z key_w_fix bellmail

VIOS Level Interim Fix (*.Z) KEY PRODUCT(S)
----------------------------------------------------------
2.2.4.x IV97356m9a.170830.epkg.Z key_w_fix bellmail
2.2.5.x IV97356m9a.170830.epkg.Z key_w_fix bellmail

For caccelstat:

AIX Level Interim Fix (*.Z) KEY PRODUCT(S)
----------------------------------------------------------
7.2.0.3 IV97811s2a.170712.epkg.Z key_w_fix caccelstat
7.2.0.4 IV97811s2a.170712.epkg.Z key_w_fix caccelstat
7.2.0.5 IV97811s2a.170712.epkg.Z key_w_fix caccelstat
7.2.1.1 IV97811s2a.170712.epkg.Z key_w_fix caccelstat
7.2.1.2 IV97811s2a.170712.epkg.Z key_w_fix caccelstat
7.2.1.3 IV97811s2a.170712.epkg.Z key_w_fix caccelstat

For iostat:

AIX Level Interim Fix (*.Z) KEY PRODUCT(S)
----------------------------------------------------------
7.1.4.3 IV97896s4a.170712.epkg.Z key_w_fix iostat
7.1.4.4 IV97896s4a.170712.epkg.Z key_w_fix iostat
7.1.4.5 IV97896s4a.170712.epkg.Z key_w_fix iostat
7.2.0.3 IV97898s2a.171201.epkg.Z key_w_fix iostat
7.2.0.4 IV97898s2a.171201.epkg.Z key_w_fix iostat
7.2.0.5 IV97898s2a.171201.epkg.Z key_w_fix iostat
7.2.1.1 IV97898s2a.171201.epkg.Z key_w_fix iostat
7.2.1.2 IV97898s2a.171201.epkg.Z key_w_fix iostat
7.2.1.3 IV97898s2a.171201.epkg.Z key_w_fix iostat

For lquerypv:

AIX Level Interim Fix (*.Z) KEY PRODUCT(S)
----------------------------------------------------------
5.3.12.9 IJ00951s9a.171031.epkg.Z key_w_fix lquerypv
6.1.9.7 IV99548m9a.171031.epkg.Z key_w_fix lquerypv
6.1.9.8 IV99548m9a.171031.epkg.Z key_w_fix lquerypv
6.1.9.9 IV99548m9a.171031.epkg.Z key_w_fix lquerypv
7.1.4.3 IV99550m5a.171031.epkg.Z key_w_fix lquerypv
7.1.4.4 IV99550m5a.171031.epkg.Z key_w_fix lquerypv
7.1.4.5 IV99550m5a.171031.epkg.Z key_w_fix lquerypv
7.2.0.3 IV99551m5a.171031.epkg.Z key_w_fix lquerypv
7.2.0.4 IV99551m5a.171031.epkg.Z key_w_fix lquerypv
7.2.0.5 IV99551m5a.171031.epkg.Z key_w_fix lquerypv
7.2.1.1 IV99552m3a.171031.epkg.Z key_w_fix lquerypv
7.2.1.2 IV99552m3a.171031.epkg.Z key_w_fix lquerypv
7.2.1.3 IV99552m3a.171031.epkg.Z key_w_fix lquerypv

VIOS Level Interim Fix (*.Z) KEY PRODUCT(S)
----------------------------------------------------------
2.2.4.x IV99548m9a.171031.epkg.Z key_w_fix lquerypv
2.2.5.x IV99548m9a.171031.epkg.Z key_w_fix lquerypv

For restbyinode:

AIX Level Interim Fix (*.Z) KEY PRODUCT(S)
----------------------------------------------------------
5.3.12.9 IV98013s9a.170717.epkg.Z key_w_fix restbyinode
6.1.9.7 IV97852s7a.170713.epkg.Z key_w_fix restbyinode
6.1.9.8 IV97852s7a.170713.epkg.Z key_w_fix restbyinode
6.1.9.9 IV97852s7a.170713.epkg.Z key_w_fix restbyinode
7.1.4.3 IV97957s2b.171205.epkg.Z key_w_fix restbyinode
7.1.4.4 IV97957s2b.171205.epkg.Z key_w_fix restbyinode
7.1.4.5 IV97957s2b.171205.epkg.Z key_w_fix restbyinode
7.2.0.3 IV97959s2b.171205.epkg.Z key_w_fix restbyinode
7.2.0.4 IV97959s2b.171205.epkg.Z key_w_fix restbyinode
7.2.0.5 IV97959s2b.171205.epkg.Z key_w_fix restbyinode
7.2.1.1 IV97958s0b.171205.epkg.Z key_w_fix restbyinode
7.2.1.2 IV97958s0b.171205.epkg.Z key_w_fix restbyinode
7.2.1.3 IV97958s0b.171205.epkg.Z key_w_fix restbyinode

VIOS Level Interim Fix (*.Z) KEY PRODUCT(S)
----------------------------------------------------------
2.2.4.x IV97852s7a.170713.epkg.Z key_w_fix restbyinode
2.2.5.x IV97852s7a.170713.epkg.Z key_w_fix restbyinode

For vmstat:

AIX Level Interim Fix (*.Z) KEY PRODUCT(S)
----------------------------------------------------------
7.1.4.3 IV97899s4a.170712.epkg.Z key_w_fix vmstat
7.1.4.4 IV97899s4a.170712.epkg.Z key_w_fix vmstat
7.1.4.5 IV97899s4a.170712.epkg.Z key_w_fix vmstat
7.2.0.3 IV97901s2a.171201.epkg.Z key_w_fix vmstat
7.2.0.4 IV97901s2a.171201.epkg.Z key_w_fix vmstat
7.2.0.5 IV97901s2a.171201.epkg.Z key_w_fix vmstat
7.2.1.1 IV97901s2a.171201.epkg.Z key_w_fix vmstat
7.2.1.2 IV97901s2a.171201.epkg.Z key_w_fix vmstat
7.2.1.3 IV97901s2a.171201.epkg.Z key_w_fix vmstat

The above fixes are cumulative and address previously issued AIX security bulletins with respect to binary, SP, and TL.

To extract the fixes from the tar file:

tar xvf suid_fix.tar
cd suid_fix

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
-----------------------------------------------------------------------------------------------------
a91f0cd6b294227ceb043fe99b6fb5c8b408d990d03a2b3a08c1754050b3f7a7 IJ00951s9a.171031.epkg.Z key_w_csum
a1a3696b78746d0fa1c8a9a38d5439c1ff79ba9b1a5e638124e4a25949a71429 IV97356m9a.170830.epkg.Z key_w_csum
c082f6ffe8f0f6fc5acf0df1f74eb2205a214ae23dabfee0e4cd759e707a5706 IV97811s2a.170712.epkg.Z key_w_csum
0ea5265c52e138023ba046fd22c3fcb608e3f3de30dc73bb6bf9e2c84e472544 IV97852s7a.170713.epkg.Z key_w_csum
e6d69a6719bfe59ed346e0c65155e84afe5a1640027fb79fa48d3d644ce54aaf IV97896s4a.170712.epkg.Z key_w_csum
c43608f1b64b0220456aff0cda22b8d72a95e571e42364154ef189911218353e IV97898s2a.171201.epkg.Z key_w_csum
784fc0d14370e5725f0c5294636f6f26882bf017875b8c764034db06eb8b5a4e IV97899s4a.170712.epkg.Z key_w_csum
d7c8e44dfd74dd73cf1f20eca72a638392e2e5ab232e5475eb09c9237a7b540c IV97901s2a.171201.epkg.Z key_w_csum
f19d6b09dcc7849fb76198db05a87fb31dd01a7d4052017a19e32d0fdf0d2352 IV97957s2b.171205.epkg.Z key_w_csum
0bcde1509bc593962f44b42d25a4bc888901d6334aa1605e7f7ff4a80b6e3a85 IV97958s0b.171205.epkg.Z key_w_csum
8af449ba05c85d024e0a34905da3f5363c7a18f987d6cc45f99c37252ecfb180 IV97959s2b.171205.epkg.Z key_w_csum
8e381f9e9703c246bfb5ef2b64231485aaa2ad8c81a90d7e724665e46cc633f8 IV98013s9a.170717.epkg.Z key_w_csum
7027d0d8ac6001323058462322c71b873681482d3ccaf3f4c3c14d579f80eb90 IV99497m5a.171115.epkg.Z key_w_csum
bacab656bb61f01a9f242f0620b769f65bdc79a047a53523d384fdbe7ffd63ed IV99498m5a.171115.epkg.Z key_w_csum
1db7238f02d940bdb9bd8cd2710e54287b593d2e6283588f53bcd9b526d8999a IV99499m3a.171115.epkg.Z key_w_csum
7ad19e632a57c699cefc02c20940fb3e990a04717108d3a400a97424bee78b9a IV99548m9a.171031.epkg.Z key_w_csum
14064b0be5b940a349d4c4837e5791f64061dab35ffd0e3eb60cb5a6f30a358c IV99550m5a.171031.epkg.Z key_w_csum
37359dbd4c06b36a7ae3d555e5f3d121e04825ec385af31b6006451abe9e82da IV99551m5a.171031.epkg.Z key_w_csum
25bef666dea79510eb090451833937dafdeebc343bb00044284bfa3f0d532a95 IV99552m3a.171031.epkg.Z 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 at <http://ibm.com/support/> and describe the discrepancy.

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/security/suid_advisory.asc.sig>
<https://aix.software.ibm.com/aix/efixes/security/suid_advisory.asc.sig>
<ftp://aix.software.ibm.com/aix/efixes/security/suid_advisory.asc.sig>

C. 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 preview a fix installation:

installp -a -d fix_name -p all # where fix_name is the name of the
# fix package being previewed.

To install a fix package:

installp -a -d fix_name -X all # where fix_name is the name of the
# fix package being installed.

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:

<http://www14.software.ibm.com/webapp/set2/sas/f/aix.efixmgmt/home.html>
<https://www14.software.ibm.com/webapp/set2/sas/f/aix.efixmgmt/home.html>

To preview an interim fix installation:

emgr -e epkg_name -p # where epkg_name is the name of the
# interim fix package being previewed.

To install an interim fix package:

emgr -e epkg_name -X # where epkg_name is the name of the
# interim fix package being installed.