-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                              ESB-2022.6458.2
              FortiOS - heap-based buffer overflow in sslvpnd
                             13 December 2022

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           FortiOS
Publisher:         Fortinet
Operating System:  Network Appliance
Resolution:        Patch/Upgrade
CVE Names:         CVE-2022-42475  

Original Bulletin: 
   https://fortiguard.fortinet.com/psirt/FG-IR-22-398

Comment: CVSS (Max):  9.3 CVE-2022-42475 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
         CVSS Source: Fortinet
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Revision History:  December 13 2022: Flagging as an 'Alert' - Rated 'Critical' severity, by Fortinet.
                   December 13 2022: Initial Release

- --------------------------BEGIN INCLUDED TEXT--------------------

FortiOS - heap-based buffer overflow in sslvpnd

IR Number    : FG-IR-22-398
Date         : Dec 12, 2022
Severity     : Critical
CVSSv3 Score : 9.3
Impact       : Execute unauthorized code or commands
CVE ID       : CVE-2022-42475
Affected Products:

FortiOS: 7.2.2, 7.2.1, 7.2.0, 7.0.8, 7.0.7, 7.0.6, 7.0.5, 
7.0.4, 7.0.3, 7.0.2, 7.0.1, 7.0.0, 6.4.9, 6.4.8, 6.4.7, 6.4.6, 6.4.5, 6.4.4, 
6.4.3, 6.4.2, 6.4.10, 6.4.1, 6.4.0, 6.2.9, 6.2.8, 6.2.7, 6.2.6, 6.2.5, 6.2.4, 
6.2.3, 6.2.2, 6.2.11, 6.2.10, 6.2.1, 6.2.0

Language     : English, Portuguese

Summary

A heap-based buffer overflow vulnerability [CWE-122] in FortiOS SSL-VPN may
allow a remote unauthenticated attacker to execute arbitrary code or commands
via specifically crafted requests.

Exploitation status:

Fortinet is aware of an instance where this vulnerability was exploited in the
wild, and recommends immediately validating your systems against the following
indicators of compromise:

Multiple log entries with:

Logdesc="Application crashed" and msg="[...] application:sslvpnd,[...], Signal
11 received, Backtrace: [...]"

Presence of the following artifacts in the filesystem:

/data/lib/libips.bak
/data/lib/libgif.so
/data/lib/libiptcp.so
/data/lib/libipudp.so
/data/lib/libjepg.so
/var/.sslvpnconfigbk
/data/etc/wxd.conf
/flash

Connections to suspicious IP addresses from the FortiGate:

188.34.130.40:444
103.131.189.143:30080,30081,30443,20443
192.36.119.61:8443,444
172.247.168.153:8033

Affected Products

FortiOS version 7.2.0 through 7.2.2
FortiOS version 7.0.0 through 7.0.8
FortiOS version 6.4.0 through 6.4.10
FortiOS version 6.2.0 through 6.2.11
FortiOS-6K7K version 7.0.0 through 7.0.7
FortiOS-6K7K version 6.4.0 through 6.4.9
FortiOS-6K7K version 6.2.0 through 6.2.11
FortiOS-6K7K version 6.0.0 through 6.0.14

Solutions

Please upgrade to FortiOS version 7.2.3 or above
Please upgrade to FortiOS version 7.0.9 or above
Please upgrade to FortiOS version 6.4.11 or above
Please upgrade to FortiOS version 6.2.12 or above
Please upgrade to FortiOS-6K7K version 7.0.8 or above
Please upgrade to FortiOS-6K7K version 6.4.10 or above
Please upgrade to FortiOS-6K7K version 6.2.12 or above
Please upgrade to FortiOS-6K7K version 6.0.15 or above

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: https://auscert.org.au/gpg-key/
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=xWI0
-----END PGP SIGNATURE-----