Bug 1207142 (CVE-2015-2753, CVE-2015-2754, CVE-2015-2776)

Summary: CVE-2015-2753 CVE-2015-2754 CVE-2015-2776 freexl: multiple flaws when parsing malformed input
Product: [Other] Security Response Reporter: Martin Prpič <mprpic>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bleanhar, ccoleman, dmcphers, jdetiber, jialiu, jkeck, joelsmith, jokerman, kseifried, lmeyer, mmccomas, volker27
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: FreeXL 1.0.1 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2017-09-12 12:25:25 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: 1207143, 1207144, 1207145    
Bug Blocks: 1207147    

Description Martin Prpič 2015-03-30 10:14:04 UTC
The following flaws have been found in FreeXL, a library that parses Microsoft Excel spreadsheets:

#1: A flaw was found in the way FreeXL reads sectors from the input file. A specially crafted file could possibly result in stack corruption near freexl.c:3752.

Reproducer: https://www.dropbox.com/s/3htzndywvtmomlx/freexl_9f74b0e8?dl=0

#2: A flaw was found in the function allocate_cells(). A specially crafted file with invalid workbook dimensions could possibly result in stack corruption near freexl.c:1074

Reproducer: https://www.dropbox.com/s/dcnbbntf7lp03yn/freexl_c9be2aa7?dl=0

#3: A flaw was found in the way FreeXL handles a premature EOF. A specially crafted input file could possibly result in stack corruption near freexl.c:1131

Reproducer: https://www.dropbox.com/s/66srfory903w6cl/freexl_d7273f72?dl=0

#4: FreeXL 1.0.0g did not properly check requests for workbook memory allocation. A specially crafted input file could cause a Denial of Service, or possibly write onto the stack.

Reproducer (ulimit -Sv 128000):

CVE assignments and original report at:


Upstream patch:


These flaws are fixed in version 1.0.1 of FreeXL:


Comment 1 Martin Prpič 2015-03-30 10:16:09 UTC
These flaws have already been fixed in Fedora via:

FEDORA-2015-4444      freexl-1.0.1-1.fc20
FEDORA-2015-4435      freexl-1.0.1-1.fc21
FEDORA-2015-4431      freexl-1.0.1-1.fc22

Comment 3 Martin Prpič 2015-03-30 10:16:49 UTC
Created freexl tracking bugs for this issue:

Affects: epel-6 [bug 1207143]
Affects: epel-7 [bug 1207144]