| Name | CVE-2019-5020 |
| Description | An exploitable denial of service vulnerability exists in the object lookup functionality of Yara 3.8.1. A specially crafted binary file can cause a negative value to be read to satisfy an assert, resulting in Denial of Service. An attacker can create a malicious binary to trigger this vulnerability. |
| 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 |
|---|
| yara (PTS) | jessie | 3.1.0-2+deb8u1 | fixed |
| stretch | 3.5.0+dfsg-9 | fixed |
| buster | 3.9.0-1 | fixed |
| bullseye | 4.0.5-1 | fixed |
| bookworm | 4.2.3-4 | fixed |
| sid, trixie | 4.5.2-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| yara | source | wheezy | (unfixed) | end-of-life | | |
| yara | source | jessie | (not affected) | | | |
| yara | source | stretch | (not affected) | | | |
| yara | source | (unstable) | 3.9.0-1 | | | |
Notes
[stretch] - yara <not-affected> (dex module introduced in 3.8.0)
[jessie] - yara <not-affected> (dex module introduced in 3.8.0)
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0781
https://github.com/VirusTotal/yara/issues/1023
https://github.com/VirusTotal/yara/commit/1ecb0e66431bf5c5b4c2fdf622be969eb5f4a7cc
https://github.com/VirusTotal/yara/commit/a3784d3855029bd0ad24071e72746cc0c31b8cba