CVE-2021-33643
CRITICALCVSS 9.1/10EPSS 1.33%
Last modified
CVE-2021-33643 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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.. EPSS estimates a 1.33% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Feep | Libtar | < 1.2.21 | — |
| Openatom | Openeuler | 20.03 | Sp1 |
| Openatom | Openeuler | 22.03 | — |
| Fedoraproject | Fedora | 35 | — |
| Fedoraproject | Fedora | 36 | — |
| Fedoraproject | Fedora | 37 | — |
References
- https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1807Broken Link, Third Party Advisory
- https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1807Broken Link, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2021-33643?
CVE-2021-33643 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.33% probability of exploitation in the next 30 days.
How do I fix CVE-2021-33643?
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-2021-33643?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST