CVE-2012-3456Calligra Memory Corruption
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…
Published Aug 20, 2012 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2012-3456
Key Facts
Patch immediately- CVE-2012-3456 is a high-severity vulnerability (CVSS 7.5 v2) affecting Calligra.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 20% probability of exploitation in the next 30 days.
- Fixed versions are available, including Calligra 1:2.4.3-2, Calligra 2.4.3.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v2
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS (30-day exploit likelihood)
20%
Higher than 97.4% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
36/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Advisories And Exploit References
- advisoryhttps://security-tracker.debian.org/tracker/CVE-2012-3456
- advisory50050
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.
Affected Products
21 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| CalligraCalligra | 2.4, 2.4.1, 2.4.2, 2.4-beta2, 2.4-beta3, 2.4-beta4, 2.4-beta6, 2.4-beta7 | 2.4.3 |
Patched Releases
Calligra
1:2.4.3-2, 2.4.3
Timeline
Publicly disclosed
Aug 20, 2012
Last updated
Aug 4, 2026
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
- advisorysecurity-tracker.debian.org · CVE-2012-3456
- advisory50050
- exploitExploitDB-37576
- exploit54816
- otheropenSUSE-SU-2012:1061
FAQ
Common Questions.
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.
Affected: Calligra versions 2.4, 2.4.1, 2.4.2, 2.4-beta2, 2.4-beta3, 2.4-beta4, 2.4-beta6, 2.4-beta7. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Calligra 1:2.4.3-2, Calligra 2.4.3.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2012-3456 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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