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: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: 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:
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.