CVE-2021-33646
First published: Tue Aug 09 2022(Updated: )
The th_read() function doesn’t free a variable t->th_buf.gnu_longname after allocating memory, which may cause a memory leak.
Credit: securities@openeuler.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| CentOS Libtar | <1.2.21 | |
| openEuler | =20.03-sp1 | |
| openEuler | =20.03-sp3 | |
| openEuler | =22.03 | |
| Fedora | =35 | |
| Fedora | =36 | |
| Fedora | =37 |
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Reference Links
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4S4PJRCJLEAWN2EKXGLSOBTL7O57V7NC/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5YSHZY753R7XW6CIKJVAWI373WW3YRRJ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7Q26QDNOJDOFYWMJWEIK5XR62M2FF6IJ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7WX5YE66CT7Y5C2HTHXSFDKQWYWYWJ2T/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OD4HEBSTI22FNYKOKK7W3X6ZQE6FV3XC/
- https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1807
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5YSHZY753R7XW6CIKJVAWI373WW3YRRJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OD4HEBSTI22FNYKOKK7W3X6ZQE6FV3XC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7Q26QDNOJDOFYWMJWEIK5XR62M2FF6IJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S4PJRCJLEAWN2EKXGLSOBTL7O57V7NC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7WX5YE66CT7Y5C2HTHXSFDKQWYWYWJ2T/
Frequently Asked Questions
What is the severity of CVE-2021-33646?
CVE-2021-33646 is classified as a medium severity vulnerability due to its potential to cause memory leaks.
How do I fix CVE-2021-33646?
To fix CVE-2021-33646, update to a version of libtar that is greater than 1.2.21 or apply the relevant patches if provided.
What systems are affected by CVE-2021-33646?
CVE-2021-33646 affects versions of libtar prior to 1.2.21 and specific releases of Huawei openEuler and Fedora.
What is the impact of CVE-2021-33646?
The impact of CVE-2021-33646 is primarily a memory leak, which can lead to degraded system performance over time.
Is CVE-2021-33646 being actively exploited?
As of now, there is no public indication that CVE-2021-33646 is being actively exploited in the wild.
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