CVE-2021-27836: Null Pointer Dereference
First published: Wed Nov 03 2021(Updated: )
An issue was discoverered in in function xls_getWorkSheet in xls.c in libxls 1.6.2, allows attackers to cause a denial of service, via a crafted XLS file.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Libxls Project Libxls | =1.6.2 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 | |
| Fedoraproject Fedora | =35 |
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Reference Links
- https://github.com/libxls/libxls/issues/94
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5D7XXCVFYRRMI4ENXYSD3MZEBS6SMI7E/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SFOE4Z6T46LA47VXWUVET4ELXRZQ3BWB/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Y6XOTFEOCHYKZAFCB6H3KNIIFJ3UFV7V/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SFOE4Z6T46LA47VXWUVET4ELXRZQ3BWB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y6XOTFEOCHYKZAFCB6H3KNIIFJ3UFV7V/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5D7XXCVFYRRMI4ENXYSD3MZEBS6SMI7E/
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2021-27836.
What is the severity of CVE-2021-27836?
The severity of CVE-2021-27836 is medium with a CVSS score of 6.5.
How can this vulnerability be exploited?
This vulnerability can be exploited by attackers through a crafted XLS file.
How can I mitigate the risk associated with CVE-2021-27836?
To mitigate the risk associated with CVE-2021-27836, it is recommended to update to the latest version of libxls (1.6.3 or later) or apply the necessary patches provided by the vendor.
Where can I find more information about CVE-2021-27836?
You can find more information about CVE-2021-27836 on the following references: [link1], [link2], [link3].
- collector/nvd-index
- agent/weakness
- agent/severity
- agent/references
- agent/author
- agent/event
- agent/tags
- agent/description
- agent/type
- agent/remedy
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- vendor/libxls project
- canonical/libxls project libxls
- version/libxls project libxls/1.6.2
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/33
- version/fedoraproject fedora/34
- version/fedoraproject fedora/35