CVE-2011-1331
CVE-2011-1331 is a critical-severity vulnerability in Justsystems Ichitaro with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.
Key facts
- Severity: Critical (CVSS 2.0 base score 9.3)
- EPSS exploit prediction: 6% (92nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-119
- Affected product: Justsystems Ichitaro
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2011-1331?
- CVE-2011-1331 has a CVSS 2.0 base score of 9.3, rated critical severity.
- Is CVE-2011-1331 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2011-1331?
- CVE-2011-1331 primarily affects Justsystems Ichitaro. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2011-1331?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2011-1331 published?
- CVE-2011-1331 was published on 2011-07-18 and last updated on 2026-06-16.
References
- http://jvn.jp/en/jp/JVN87239473/index.html
- http://jvndb.jvn.jp/jvndb/JVNDB-2011-000043
- http://secunia.com/advisories/44956
- http://www.justsystems.com/jp/info/js11001.html
- http://www.securityfocus.com/bid/48283
- http://www.symantec.com/connect/blogs/targeted-attacks-2011-using-ichitaro-zero-day-vulnerability
- https://exchange.xforce.ibmcloud.com/vulnerabilities/68072
Affected products (21)
- cpe:2.3:a:justsystems:ichitaro:6:-:government:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro:2005:*:*:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro:2006:*:*:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro:2006:-:government:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro:2007:*:*:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro:2007:-:government:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro:2008:*:*:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro:2008:-:government:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro:2009:*:*:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro:2009:-:government:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro:2010:*:*:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro:2010:-:government:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro:2011:*:*:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro_portable:*:*:*:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro_pro:*:*:*:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro_viewer:*:*:*:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro_viewer:5.1.3.0:*:*:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro_viewer:19.0.1.0:*:*:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro_viewer:19.0.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro_viewer:19.0.3.0:*:*:*:*:*:*:*
- cpe:2.3:a:justsystems:ichitaro_viewer:20.0.2.0:*:*:*:*:*:*:*
More vulnerabilities in Justsystems Ichitaro
- CVE-2014-7247 — Critical (CVSS 10.0): Unspecified vulnerability in JustSystems Ichitaro 2008 through 2011; Ichitaro Government 6, 7, 2008, 2009, and 2010;…
- CVE-2013-3644 — Critical (CVSS 10.0): Unspecified vulnerability in JustSystems Ichitaro 2006 through 2013; Ichitaro Pro through 2; Ichitaro Government 6, 7,…
- CVE-2013-5990 — Critical (CVSS 9.3): Unspecified vulnerability in JustSystems Ichitaro 2006 through 2011; Ichitaro Government 6, 7, and 2006 through 2010;…
- CVE-2013-0707 — Critical (CVSS 9.3): Unspecified vulnerability in JustSystems Ichitaro 2006 and 2007, Ichitaro Government 2006 and 2007, Ichitaro Portable…
- CVE-2012-0269 — Critical (CVSS 9.3): Buffer overflow in JustSystems Ichitaro 2011 Sou, Ichitaro 2006 through 2011, Ichitaro Government 2006 through 2010,…
- CVE-2010-3916 — Critical (CVSS 9.3): Unspecified vulnerability in JustSystems Ichitaro and Ichitaro Government allows remote attackers to execute arbitrary…
All CVEs affecting Justsystems Ichitaro →
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