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Fencer Intel
high 7.5

CVE-2012-3456 in the critical feed json

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…

published 2012-08-20 14 y ago modified 2026-06-16 4 mo ago also EUVD-2012-3417

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
20.1%
EPSS 20.1% chance of exploitation in 30 days, percentile 97%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

  • calligra Debian 14, Debian 13, Debian 12 1:2.4.3-2

debian advisories DEBIAN-CVE-2012-3456

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2012-3456 updated cvss 4.4

Calligra: DOC file rendering buffer overflow

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-37576)
  2. Published

Exploit prediction

20.07% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-37576 Alligra Calligra - Heap Buffer Overflow remote, 2012-08-07
  • securityfocus.com http://www.securityfocus.com/bid/54816 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.