Bug 1903296 (CVE-2020-27819)

Summary:	CVE-2020-27819 libxls: NULL pointer dereference via crafted xls file
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	quantum.analyst
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libxls 1.6.2	Doc Type:	If docs needed, set a value
Doc Text:	An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-12-01 23:33:51 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1903297
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2020-12-01 19:20:36 UTC

An issue was discovered in libxls reading Excel files before 1.6.1. A NULL pointer dereference vulnerability exists when parsing xls cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted xls file.

Reference:
https://github.com/libxls/libxls/issues/84

Comment 1 Guilherme de Almeida Suckevicz 2020-12-01 19:20:50 UTC

Created libxls tracking bugs for this issue:

Affects: fedora-all [bug 1903297]

Comment 2 Product Security DevOps Team 2020-12-01 23:33:51 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.