PT-2021-17634 · Readxl+2 · Readxl+2

Lockedbyte · Published 2021-11-03 · Updated 2023-07-13 · CVE-2021-27836

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: libxls version 1.6.2 readxl (affected versions not specified)

Description: An issue was discovered in the xls getWorkSheet function within xls.c in libxls, allowing attackers to cause a denial of service via a crafted XLS file. This can lead to a Denial of Service (DoS) attack when a specially crafted XLS file is utilized.

Recommendations: For libxls version 1.6.2, consider disabling the xls getWorkSheet function until a patch is available. For readxl, as the affected versions are not specified, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2021-27836

OPENSUSE-SU-2022:0142-1

OPENSUSE-SU-2024:12084-1

RSEC-2023-2

Affected Products

Debian

Libxls

Readxl

References · 21

• https://github.com/libxls/libxls/issues/94 · Patch
• https://security-tracker.debian.org/tracker/CVE-2021-27836 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2022:0142-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y6XOTFEOCHYKZAFCB6H3KNIIFJ3UFV7V · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5D7XXCVFYRRMI4ENXYSD3MZEBS6SMI7E · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-27836 · Vendor Advisory
• https://osv.dev/vulnerability/RSEC-2023-2 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-27836 · Security Note
• https://ubuntu.com/security/CVE-2021-27836 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-27836 · Vendor Advisory
• https://security-tracker.debian.org/tracker/source-package/r-cran-readxl · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-27836 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-27836 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SFOE4Z6T46LA47VXWUVET4ELXRZQ3BWB · Vendor Advisory
• https://github.com/tidyverse/readxl/issues/679 · Note