Use After Free in Libarchive

CVE-2018-1000878

libarchive version commit 416694915449219d505531b1096384f3237dd6cc onwards (release v3.1.0 onwards) contains a CWE-416: Use After Free vulnerability in RAR decoder - libarchive/archive_read_support_format_rar.c that can result in Crash/DoS - it is unknown if RCE is possible. This attack appear to be exploitable via the victim must open a specially crafted RAR archive.

Vulnerability class: Use-After-Free

EPSS: 0.044 (90.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2018-1000878?
CVE-2018-1000878 is a high-severity vulnerability in Libarchive, classified under Use After Free. CVSS score: 8.8/10. Published 2018-12-20.
How severe is CVE-2018-1000878?
High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2018-1000878 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.