Bug 1223697 (CVE-2023-26793) - VUL-0: CVE-2023-26793: libmodbus: heap-based buffer overflow vulnerability in read_io_status function in src/modbus.c.
Summary: VUL-0: CVE-2023-26793: libmodbus: heap-based buffer overflow vulnerability in...
Status: CONFIRMED
Alias: CVE-2023-26793
Product: openSUSE Distribution
Classification: openSUSE
Component: Security (show other bugs)
Version: Leap 15.6
Hardware: Other Other
: P3 - Medium : Normal (vote)
Target Milestone: ---
Assignee: Stanislav Brabec
QA Contact: Security Team bot
URL: https://smash.suse.de/issue/403923/
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Reported: 2024-05-02 10:50 UTC by SMASH SMASH
Modified: 2024-06-11 22:17 UTC (History)
1 user (show)

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Found By: Security Response Team
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Description SMASH SMASH 2024-05-02 10:50:03 UTC 
libmodbus v3.1.10 has a heap-based buffer overflow vulnerability in read_io_status function in src/modbus.c.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-26793
https://www.cve.org/CVERecord?id=CVE-2023-26793
https://github.com/stephane/libmodbus/issues/683
Comment 1 Andrea Mattiazzo 2024-05-02 10:50:54 UTC 
No information upstream

Tracking as affected:
- openSUSE:Backports:SLE-15-SP5/libmodbus    3.1.10
- openSUSE:Backports:SLE-15-SP6/libmodbus    3.1.10
- openSUSE:Factory/libmodbus                 3.1.10
Comment 2 Stanislav Brabec 2024-05-06 16:06:56 UTC 
However it is more than a year old report, there is apparently no fix yet.

https://nvd.nist.gov/vuln/detail/CVE-2023-26793
This vulnerability is currently awaiting analysis.
Comment 3 Stanislav Brabec 2024-06-11 22:17:50 UTC 
Checking the upstream, there is no fix. The upstream issue has no progress.

Is it serious enough to start a research? Note that we have no Modbus testing hardware.