Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2011-1331

JustSystems Ichitaro 2005 through 2011, Ichitaro Government 6, Ichitaro Government 2006 through 2010, Ichitaro Portable, Ichitaro Pro, and Ichitaro Viewer allow remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via a crafted document, as exploited in the wild in early 2011.

Security Impact Summary

CVE-2011-1331 is a security vulnerability that . Impacting 4 products from justsystems, from justsystems, from justsystems and 1 other, organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2011, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2011-07-18T22:55:01.033

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 9.3 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

8.6

Impact Score

10.0

Weaknesses

Type: Primary
CWE-119

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	justsystems	ichitaro	6	Yes
Application	justsystems	ichitaro	2005	Yes
Application	justsystems	ichitaro	2006	Yes
Application	justsystems	ichitaro	2006	Yes
Application	justsystems	ichitaro	2007	Yes
Application	justsystems	ichitaro	2007	Yes
Application	justsystems	ichitaro	2008	Yes
Application	justsystems	ichitaro	2008	Yes
Application	justsystems	ichitaro	2009	Yes
Application	justsystems	ichitaro	2009	Yes
Application	justsystems	ichitaro	2010	Yes
Application	justsystems	ichitaro	2010	Yes
Application	justsystems	ichitaro	2011	Yes
Application	justsystems	ichitaro_portable	*	Yes
Application	justsystems	ichitaro_pro	*	Yes
Application	justsystems	ichitaro_viewer	*	Yes
Application	justsystems	ichitaro_viewer	5.1.3.0	Yes
Application	justsystems	ichitaro_viewer	19.0.1.0	Yes
Application	justsystems	ichitaro_viewer	19.0.2.0	Yes
Application	justsystems	ichitaro_viewer	19.0.3.0	Yes
Application	justsystems	ichitaro_viewer	20.0.2.0	Yes

References

http://jvn.jp/en/jp/JVN87239473/index.html ([email protected])
http://jvndb.jvn.jp/jvndb/JVNDB-2011-000043 ([email protected])
http://secunia.com/advisories/44956 Vendor Advisory ([email protected])
http://www.justsystems.com/jp/info/js11001.html Patch, Vendor Advisory ([email protected])
http://www.securityfocus.com/bid/48283 ([email protected])
http://www.symantec.com/connect/blogs/targeted-attacks-2011-using-ichitaro-zero-day-vulnerability Exploit ([email protected])
https://exchange.xforce.ibmcloud.com/vulnerabilities/68072 ([email protected])
http://jvn.jp/en/jp/JVN87239473/index.html (af854a3a-2127-422b-91ae-364da2661108)
http://jvndb.jvn.jp/jvndb/JVNDB-2011-000043 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/44956 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.justsystems.com/jp/info/js11001.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/48283 (af854a3a-2127-422b-91ae-364da2661108)
http://www.symantec.com/connect/blogs/targeted-attacks-2011-using-ichitaro-zero-day-vulnerability Exploit (af854a3a-2127-422b-91ae-364da2661108)
https://exchange.xforce.ibmcloud.com/vulnerabilities/68072 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For justsystems's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.