CVE-2021-28831
First published: Fri Mar 19 2021(Updated: )
decompress_gunzip.c in BusyBox through 1.32.1 mishandles the error bit on the huft_build result pointer, with a resultant invalid free or segmentation fault, via malformed gzip data.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Busybox Busybox | >=1.32.0<=1.32.1 | |
| Fedoraproject Fedora | =32 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 | |
| Debian Debian Linux | =9.0 | |
| debian/busybox | <=1:1.30.1-6 | 1:1.35.0-4 1:1.36.1-9 |
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Reference Links
- https://git.busybox.net/busybox/commit/?id=f25d254dfd4243698c31a4f3153d4ac72aa9e9bd
- https://lists.debian.org/debian-lts-announce/2021/04/msg00001.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3UDQGJRECXFS5EZVDH2OI45FMO436AC4/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z7ZIFKPRR32ZYA3WAA2NXFA3QHHOU6FJ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZASBW7QRRLY5V2R44MQ4QQM4CZIDHM2U/
- https://security.gentoo.org/glsa/202105-09
- https://launchpad.net/bugs/cve/CVE-2021-28831
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3UDQGJRECXFS5EZVDH2OI45FMO436AC4/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7ZIFKPRR32ZYA3WAA2NXFA3QHHOU6FJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZASBW7QRRLY5V2R44MQ4QQM4CZIDHM2U/
- https://security-tracker.debian.org/tracker/CVE-2021-28831
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28831
- https://nvd.nist.gov/vuln/detail/CVE-2021-28831
- https://ubuntu.com/security/CVE-2021-28831
Frequently Asked Questions
What is CVE-2021-28831?
CVE-2021-28831 is a vulnerability in BusyBox through version 1.32.1 that mishandles the error bit on the huft_build result pointer, leading to an invalid free or segmentation fault when processing malformed gzip data.
What software is affected by CVE-2021-28831?
BusyBox versions up to and including 1.32.1 are affected by CVE-2021-28831.
How can the CVE-2021-28831 vulnerability be exploited?
The CVE-2021-28831 vulnerability can be exploited by providing the affected software with malformed gzip data, which can trigger an invalid free or segmentation fault.
Is there a fix for CVE-2021-28831?
Yes, updating BusyBox to version 1.32.2 or later will fix the CVE-2021-28831 vulnerability.
Where can I find more information about CVE-2021-28831?
You can find more information about CVE-2021-28831 on the MITRE CVE website and the Ubuntu security notices.
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