CVE catalog
CVE-2021-20285
DEBIAN-CVE-2021-20285
- Severity
- Medium · CVSS 6.6
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.75% · Oct 25, 2026
A flaw was found in upx canPack in p_lx_elf.cpp in UPX 3.96. This flaw allows attackers to cause a denial of service (SEGV or buffer overflow and application crash) or possibly have unspecified other impacts via a crafted ELF. The highest threat from this vulnerability is to system availability.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | upx-ucl | 13 | 4.2.2-1 | fixed |
| Debian | upx-ucl | 14 | 4.2.2-1 | fixed |
| Suse | upx | package hub 15 sp4 | 4.0.2-bp154.4.6.1 | fixed |
| Opensuse | upx | leap 15.4 | 4.0.2-bp154.4.6.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | upx-ucl | deb | 13 | 4.2.2-1 | Not reported | DEBIAN-CVE-2021-20285 | Not reported |
| Debian | upx-ucl | deb | 14 | 4.2.2-1 | Not reported | DEBIAN-CVE-2021-20285 | Not reported |
| Suse | upx | rpm | package hub 15 sp4 | 4.0.2-bp154.4.6.1 | Not reported | OPENSUSE-SU-2023:0088-1 | Not reported |
| Opensuse | upx | rpm | leap 15.4 | 4.0.2-bp154.4.6.1 | Not reported | OPENSUSE-SU-2023:0088-1 | Not reported |
OpenFactory catalog packages
[Debian 13 (Trixie)]
- [upx-ucl]Fixed
Details (2)
4.2.4-1.1· amd64 · trixieFixed · Fixed:
4.2.2-1pypi · upx-ucl · debian · 13
4.2.4-1.1· arm64 · trixieFixed · Fixed:
4.2.2-1pypi · upx-ucl · debian · 13
Observed: