FG-IR-23-183: Proxy mode with deep inspection - Stack-based buffer overflow
First published: Tue Jul 11 2023(Updated: )
A stack-based overflow vulnerability [CWE-124] in FortiOS & FortiProxy may allow a remote attacker to execute arbitrary code or command via crafted packets reaching proxy policies or firewall policies with proxy mode alongside SSL deep packet inspection.## Workaround:Disable HTTP/2 support on SSL inspection profiles used by proxy policies or firewall policies with proxy mode.Example with custom-deep-inspection profile:<br/>config firewall ssl-ssh-profile<br/>edit "custom-deep-inspection"<br/>set supported-alpn http1-1<br/>next<br/>end<br/>https://docs.fortinet.com/document/fortigate/7.0.0/new-features/710924/http-2-support-in-proxy-mode-ssl-inspection
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FortiOS | ||
| Fortinet FortiProxy SSL VPN webmode |
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Reference Links
Frequently Asked Questions
What is the severity of FG-IR-23-183?
The severity of FG-IR-23-183 is critical due to its potential to allow remote code execution.
How do I fix FG-IR-23-183?
To fix FG-IR-23-183, it is recommended to disable HTTP/2 support in FortiOS and FortiProxy configurations.
What versions of software are affected by FG-IR-23-183?
FG-IR-23-183 affects Fortinet FortiOS and FortiProxy without specifying version numbers.
What types of attacks are possible with FG-IR-23-183?
FG-IR-23-183 can allow attackers to execute arbitrary code or commands via crafted packets.
What is the nature of the vulnerability FG-IR-23-183?
FG-IR-23-183 is a stack-based overflow vulnerability that compromises system integrity.
- agent/type
- collector/fortiguard-psirt
- source/FortiGuard
- alias/CVE-2023-33308
- agent/severity
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- agent/first-publish-date
- agent/last-modified-date
- collector/fortiguard-psirt-latest
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- agent/guess-ai
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- vendor/fortinet
- canonical/fortios
- canonical/fortinet fortiproxy ssl vpn webmode