| Name | CVE-2020-18780 |
| Description | A Use After Free vulnerability in function new_Token in asm/preproc.c in nasm 2.14.02 allows attackers to cause a denial of service via crafted nasm command. |
| 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 | (unstable) | 2.15.04-1 | unimportant | | |
Notes
https://bugzilla.nasm.us/show_bug.cgi?id=3392634
https://bugzilla.nasm.us/show_bug.cgi?id=3392711
Crash in CLI tool, no security impact
https://github.com/netwide-assembler/nasm/commit/7c88289e222dc5ef9f53f9e86ecaab1924744b88 (nasm-2.15.04rc6)