CVE-2021-33643
First published: Tue Aug 09 2022(Updated: )
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.
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 | |
| Red Hat Fedora | =35 | |
| Red Hat Fedora | =36 | |
| Red Hat Fedora | =37 | |
| debian/libtar | <=1.2.20-8 | 1.2.20-8+deb12u1~deb11u1 1.2.20-8+deb12u1 |
| Openatom Openeuler Linux | =20.03-sp1 | |
| Openatom Openeuler Linux | =20.03-sp3 | |
| Openatom Openeuler Linux | =22.03 | |
| <1.2.21 | ||
| =20.03-sp1 | ||
| =20.03-sp3 | ||
| =22.03 | ||
| =35 | ||
| =36 | ||
| =37 |
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Reference Links
- 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/
- 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://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33643
- https://nvd.nist.gov/vuln/detail/CVE-2021-33643
- https://launchpad.net/bugs/cve/CVE-2021-33643
- https://security-tracker.debian.org/tracker/CVE-2021-33643
- https://ubuntu.com/security/CVE-2021-33643
- https://bugzilla.redhat.com/show_bug.cgi?id=2121289
- https://gitee.com/src-openeuler/libtar/blob/master/openEuler-CVE-2021-33643-CVE-2021-33644.patch
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2121291
- https://repo.openeuler.org/openEuler-22.03-LTS/update/source/Packages/libtar-1.2.20-21.oe2203.src.rpm
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2121289#c0
- https://www.openeuler.org/en/security/safety-bulletin/detail
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2121289#c4
- https://access.redhat.com/errata/RHSA-2023:2898
- https://access.redhat.com/security/cve/cve-2021-33643
Frequently Asked Questions
What is the severity of CVE-2021-33643?
The severity of CVE-2021-33643 is classified as a medium vulnerability due to the potential for an out-of-bounds read.
How do I fix CVE-2021-33643?
To fix CVE-2021-33643, upgrade to a patched version of libtar that addresses this vulnerability.
Which versions of libtar are affected by CVE-2021-33643?
CVE-2021-33643 affects libtar versions prior to 1.2.21.
What types of systems are vulnerable to CVE-2021-33643?
CVE-2021-33643 impacts systems running vulnerable versions of Huawei openEuler and Fedora.
What could happen if CVE-2021-33643 is exploited?
If exploited, CVE-2021-33643 could lead to unintended memory access, potentially resulting in information leakage.
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