# CVE-2023-52389: poco: UTF32Encoding.cpp in POCO has a Poco::UTF32Encoding integer overflow and resultant stack buffer overflow because Poco...

CVE-2023-52389 is fixed in poco on 1 platform, first by DEBIAN-CVE-2023-52389, released January 27, 2024. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2023-52389
- Priority: Urgent
- CVSS: 9.8 (critical)
- EPSS: 0.0085
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 27, 2024

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | poco Debian 11.6 (bullseye) | 1.10.0-6+deb11u2 | [DLA-4024-1](https://patchblox.com/security/data/fix/linux/dla-4024-1.md) | Jan 20, 2025 |
| Linux | poco Debian 12.15 (bookworm) | 1.11.0-3+deb12u1 | [DEBIAN-CVE-2023-52389](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52389.md) | Jan 27, 2024 |
| Linux | poco Debian 13.5 (trixie) | 1.13.0-6 | [DEBIAN-CVE-2023-52389](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52389.md) | Jan 27, 2024 |
| Linux | poco Debian 14 | 1.13.0-6 | [DEBIAN-CVE-2023-52389](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52389.md) | Jan 27, 2024 |

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