CVE-2021-33644 is a high-severity vulnerability affecting various Fedora and OpenEuler products utilizing libtar, where a crafted tar file with a zero-sized header can lead to an out-of-bounds read due to malloc(0) being called. This vulnerability has a CVSS score of 8.1, indicating a high risk, and can be exploited remotely with low attack complexity, requiring user interaction to trigger a high impact on confidentiality and availability. Despite its severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.2.21CPE matchmatch criteria | cpe:2.3:a:feep:libtar:*:*:*:*:*:*:*:* | ||
20.03CPE matchmatch criteria | cpe:2.3:o:openatom:openeuler:20.03:sp1:*:*:lts:*:*:* | ||
20.03CPE matchmatch criteria | cpe:2.3:o:openatom:openeuler:20.03:sp3:*:*:lts:*:*:* | ||
22.03CPE matchmatch criteria | cpe:2.3:o:openatom:openeuler:22.03:*:*:*:lts:*:*:* | ||
35CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.
CVE-2021-33644
Jun 11, 2024libtar: out-of-bounds read in gnu_longname
Aug 10, 2022An 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_longname causing an out-of-bounds read.
Aug 9, 2022