Out-of-bounds Read in Feep Libtar
CVE-2021-33643
An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longlink, causing an out-of-bounds read.
Vulnerability class: Buffer Overflow
EPSS: 0.013 (68.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
Affected products
- Feep Libtar
- Openatom Openeuler — versions 20.03, 22.03
- Fedoraproject Fedora — versions 35, 36, 37
- N/a Libtar — versions <1.2.21
Weakness classification (CWE)
Public proof-of-concept exploits
References
- securities@openeuler.org (Third Party Advisory, Broken Link)
- securities@openeuler.org (vendor-advisory)
- securities@openeuler.org (vendor-advisory)
- securities@openeuler.org (vendor-advisory)
- securities@openeuler.org (vendor-advisory)
- securities@openeuler.org (vendor-advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2021-33643?
- CVE-2021-33643 is a critical-severity vulnerability in Feep Libtar, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2022-08-10.
- How severe is CVE-2021-33643?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2021-33643 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.