HOMEVULNERABILITIESCVE-2009-4737
CRITICAL

CVE-2009-4737

CWE-119Published: April 6, 2010· Updated: Jun 16, 2026

9.3
CVSS v3.1

Official Description

Stack-based buffer overflow in JustSystems Corporation Ichitaro 13, 2004 through 2009, Viewer 2009 19.0.1.0 and earlier, and other versions allows context-dependent attackers to execute arbitrary code via a crafted Rich Text File (RTF), related to "pvpara ffooter."

NVD Source

Technical Analysis

CVE-2009-4737 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityM
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityC
IntegrityC
AvailabilityC
AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected Vendors & Products

justsystems2 product(s)
ichitaroichitaro viewer
Source: NVD CPE · 10 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.justsystems.com/jp/info/js09002.html
PATCHhttp://www.vupen.com/english/advisories/2009/0957
PATCHhttp://www.justsystems.com/jp/info/js09002.html
PATCHhttp://www.vupen.com/english/advisories/2009/0957
ADVISORYhttp://secunia.com/advisories/34611
ADVISORYhttp://secunia.com/advisories/34611

All References (20)

→
http://jvn.jp/en/jp/JVN33846134/index.html
→
http://jvndb.jvn.jp/ja/contents/2009/JVNDB-2009-000018.html
→
http://secunia.com/advisories/34611Vendor Advisory
→
http://www.fourteenforty.jp/research/advisory.cgi?FFRRA-20090407
→
http://www.ipa.go.jp/security/vuln/documents/2009/200904_ichitaro.html
→
http://www.justsystems.com/jp/info/js09002.htmlPatch · Vendor Advisory
→
http://www.osvdb.org/53349
→
http://www.securityfocus.com/bid/34403
→
http://www.vupen.com/english/advisories/2009/0957Patch · Vendor Advisory
→
https://exchange.xforce.ibmcloud.com/vulnerabilities/49739
→
http://jvn.jp/en/jp/JVN33846134/index.html
→
http://jvndb.jvn.jp/ja/contents/2009/JVNDB-2009-000018.html
→
http://secunia.com/advisories/34611Vendor Advisory
→
http://www.fourteenforty.jp/research/advisory.cgi?FFRRA-20090407
→
http://www.ipa.go.jp/security/vuln/documents/2009/200904_ichitaro.html

Quick Facts

CVE IDCVE-2009-4737
CVSS Score9.3 / 10
SeverityCRITICAL
WeaknessCWE-119
CISA KEVNo
Affected1 vendor(s)
PublishedApr 6, 2010

Related CVEs (CWE-119)

CVE-2020-11896
10.0
CVE-2015-5545
10.0
CVE-2017-12087
10.0
CVE-2018-19417
10.0
CVE-2024-25029
10.0
CVE-2015-5547
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2009-4737 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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