CVE-2018-19974

In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).

CVSS v3.0

5.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS v2.0

4.3 MEDIUMAV:N/AC:M/Au:N/C:P/I:N/A:N

EPSS

1.26% chance of exploitation in the next 30 days, 68th percentile

Published

2018-12-17

Updated

2024-08-05

Proof-of-concept exploits (3)

• https://bnbdr.github.io/posts/extracheese/
• VirusTotal/yara/issues/999
• bnbdr/swisscheese/

References

• CVE Record
• NVD entry

Related

• CVE-2016-10211
• CVE-2018-19975
• CVE-2018-19976
• CVE-2019-19648
• CVE-2021-45429
• CVE-2023-40857