| Name | CVE-2020-21686 |
| Description | A stack-use-after-scope issue discovered in expand_mmac_params function in preproc.c in nasm before 2.15.04 allows remote attackers to cause a denial of service via crafted asm file. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| nasm (PTS) | jessie | 2.11.05-1 | vulnerable |
| stretch | 2.12.01-1 | vulnerable |
| buster | 2.14-1 | vulnerable |
| bullseye | 2.15.05-1 | fixed |
| bookworm | 2.16.01-1 | fixed |
| sid, trixie | 2.16.03-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| nasm | source | jessie | (unfixed) | end-of-life | | |
| nasm | source | (unstable) | 2.15.04-1 | | | |
Notes
[buster] - nasm <ignored> (Minor issue)
https://bugzilla.nasm.us/show_bug.cgi?id=3392643
[stretch] - nasm <ignored> (Minor issue)