Description
A vulnerability was found in UPX up to 4.2.2. It has been rated as critical. This issue affects the function get_ne64 of the file bele.h. The manipulation leads to heap-based buffer overflow. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-259055. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | UPX | 4.2.0, 4.2.1, 4.2.2 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | upx-ucl | 4.2.4-1 | — |
| Debian 13 | upx-ucl | 4.2.4-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | upx-ucl | No fix yet | — |
| Ubuntu 26.04 LTS | upx-ucl | No fix yet | — |
| Ubuntu 25.10 | upx-ucl | No fix yet | — |
| Ubuntu 24.04 LTS | upx-ucl | No fix yet | — |
| Ubuntu 22.04 LTS | upx-ucl | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | upx-ucl | No fix yet | — |
| Ubuntu 18.04 LTS | upx-ucl | No fix yet | — |
| Ubuntu 16.04 LTS | upx-ucl | No fix yet | — |
References
- VDB-259055 | UPX bele.h get_ne64 heap-based overflow vdb-entry technical-description
- VDB-259055 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #304575 | UPX upx commit 06b0de9c77551cd4e856d453e094d8a0b6ef0d6d heap buffer overflow third-party-advisory
- https://drive.google.com/drive/folders/1qlUXvycOzGJygfkdQB9dGO6VwNRRZoih?usp=sharing exploit
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZHWZN2NX5W3WYA6ACJ746PAZXXNZETKD/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J4DNK3AFPT4KIPTBKGCJ6FC3L7AWI2TN/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AE5OZ7YUEVLXVVS6PFP5RELVICQ4K6QK/