CVE-2023-52389: poco Integer Overflow — Fix

Description

UTF32Encoding.cpp in POCO has a Poco::UTF32Encoding integer overflow and resultant stack buffer overflow because Poco::UTF32Encoding::convert() and Poco::UTF32::queryConvert() may return a negative integer if a UTF-32 byte sequence evaluates to a value of 0x80000000 or higher. This is fixed in 1.11.8p2, 1.12.5p2, and 1.13.0.

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CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-190 Integer Overflow

Affected Products

Vendor	Product	Versions
pocoproject	poco	< 1.11.8
pocoproject	poco	1.12.0 — 1.12.5
pocoproject	poco	All
pocoproject	poco	All
pocoproject	poco	All

References

Advisories & Patches

https://github.com/pocoproject/poco/compare/poco-1.12.5p2-release...poco-1.13.0-release https://github.com/pocoproject/poco/issues/4320 https://github.com/pocoproject/poco/compare/poco-1.12.5p2-release...poco-1.13.0-release https://github.com/pocoproject/poco/issues/4320

Other References

https://pocoproject.org/blog/?p=1226 https://lists.debian.org/debian-lts-announce/2025/01/msg00017.html https://pocoproject.org/blog/?p=1226

Frequently Asked Questions

What is CVE-2023-52389? +

UTF32Encoding.cpp in POCO has a Poco::UTF32Encoding integer overflow and resultant stack buffer overflow because Poco::UTF32Encoding::convert() and Poco::UTF32::queryConvert() may return a negative integer if a UTF-32 byte sequence evaluates to a value of 0x80000000 or higher. This is fixed in 1.11.8p2, 1.12.5p2, and 1.13.0. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2023-52389? +

CVE-2023-52389 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2023-52389? +

CVE-2023-52389 affects products from pocoproject, specifically: poco. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-52389? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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