CVE-2020-9308

Name: CVE-2020-9308
Creator: NVD / NIST
Published: 2020-02-20T07:15:12.013+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 2.20%

Last modified Jun 17, 2026

CVE-2020-9308 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. archive_read_support_format_rar5.c in libarchive before 3.4.2 attempts to unpack a RAR5 file with an invalid or corrupted header (such as a header size of zero), leading to a SIGSEGV or possibly unspecified other impact.. EPSS estimates a 2.20% chance of exploitation in the next 30 days.

Description

archive_read_support_format_rar5.c in libarchive before 3.4.2 attempts to unpack a RAR5 file with an invalid or corrupted header (such as a header size of zero), leading to a SIGSEGV or possibly unspecified other impact.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

2.20%

80.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Libarchive	Libarchive	>= 3.4.0, < 3.4.2
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	19.10
Fedoraproject	Fedora	31
Fedoraproject	Fedora	32

References

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20459Issue Tracking, Patch, Third Party Advisory
https://github.com/libarchive/libarchive/pull/1326Patch, Third Party Advisory
https://github.com/libarchive/libarchive/pull/1326/commits/94821008d6eea81e315c5881cdf739202961040aPatch, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6OTE7GWASH2ZOVG5H3HEN5PR6B3KF7JB/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J76F7VU7HC3GBKG5SAKTRBOFOI3RGO6M/
https://security.gentoo.org/glsa/202003-28Third Party Advisory
https://usn.ubuntu.com/4293-1/Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20459Issue Tracking, Patch, Third Party Advisory
https://github.com/libarchive/libarchive/pull/1326Patch, Third Party Advisory
https://github.com/libarchive/libarchive/pull/1326/commits/94821008d6eea81e315c5881cdf739202961040aPatch, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6OTE7GWASH2ZOVG5H3HEN5PR6B3KF7JB/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J76F7VU7HC3GBKG5SAKTRBOFOI3RGO6M/
https://security.gentoo.org/glsa/202003-28Third Party Advisory
https://usn.ubuntu.com/4293-1/Third Party Advisory

Timeline

Published: Feb 20, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-9308?

How severe is CVE-2020-9308?

CVE-2020-9308 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.20% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9308?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-9308?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST