CVE-2012-3456

Calligra < 2.4.3 - Heap-Based Buffer Overflow in Microsoft Import Filter

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2012-3456. PoCs published by Charlie Miller.

AI-analyzed exploit summary The code snippet describes a buffer overflow vulnerability in Calligra/KOffice due to improper handling of UPX data in the STD::read function. The vulnerability allows arbitrary code execution or DoS via crafted input.

Description

Heap-based buffer overflow in the read function in filters/words/msword-odf/wv2/src/styles.cpp in the Microsoft import filter in Calligra 2.4.3 and earlier allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a crafted ODF style in an ODF document. NOTE: this is the same vulnerability as CVE-2012-3455, but it was SPLIT by the CNA even though Calligra and KOffice share the same codebase.

Exploits (1)

exploitdb WRITEUP VERIFIED
by Charlie Miller · c++remotelinux
https://www.exploit-db.com/exploits/37576

The code snippet describes a buffer overflow vulnerability in Calligra/KOffice due to improper handling of UPX data in the STD::read function. The vulnerability allows arbitrary code execution or DoS via crafted input.

Classification
Writeup 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Theoretical
Target: Calligra 2.4.3, KOffice 2.3.3
No auth needed
Prerequisites: Crafted input file to trigger buffer overflow
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (13)

Core 13
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/77482
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2012/08/10/1
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2012/08/06/6
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2012/08/06/1
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2012/08/04/5
Mailing List vendor-advisory x_refsource_hp
http://marc.info/?l=bugtraq&m=136733075705494&w=2
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2012/08/04/1
Vendor Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-1525-1
Various Sources x_refsource_confirm
http://www.kde.org/info/security/advisory-20120810-1.txt
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/50050
Exploit vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/54816

Scores

EPSS 0.4217
EPSS Percentile 97.5%

Details

CWE
CWE-119
Status published
Products (4)
calligra/calligra 2.4 (7 CPE variants)
calligra/calligra 2.4.1
calligra/calligra 2.4.2
calligra/calligra < 2.4.3
Published Aug 20, 2012
Tracked Since Feb 18, 2026