| Name | CVE-2019-20021 |
| Description | A heap-based buffer over-read was discovered in canUnpack in p_mach.cpp in UPX 3.95 via a crafted Mach-O file. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 947471 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| upx-ucl (PTS) | jessie | 3.91-1 | vulnerable |
| stretch | 3.91-4 | vulnerable |
| buster | 3.95-1 | vulnerable |
| bullseye | 3.96-2 | fixed |
| bullseye (security) | 3.96-2+deb11u1 | fixed |
| sid, trixie | 4.2.4-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| upx-ucl | source | (unstable) | 3.96-1 | unimportant | | 947471 |
Notes
https://github.com/upx/upx/issues/315
https://github.com/upx/upx/commit/819c33fee2b2c33b96bef27a13cb20f2589819aa