CVE-2009-4243
CVE-2009-4243 is a critical-severity vulnerability in Realnetworks Realplayer 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: 3% (87th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-119
- Affected product: Realnetworks Realplayer
- Published:
- Last modified:
Description
RealNetworks RealPlayer 10, RealPlayer 10.5 6.0.12.1040 through 6.0.12.1741, RealPlayer 11 11.0.0 through 11.0.4, RealPlayer Enterprise, Mac RealPlayer 10 and 10.1, Linux RealPlayer 10, and Helix Player 10.x allow remote attackers to have an unspecified impact via a crafted media file that uses HTTP chunked transfer coding, related to an "overflow."
Frequently asked questions
- What is CVE-2009-4243?
- RealNetworks RealPlayer 10, RealPlayer 10.5 6.0.12.1040 through 6.0.12.1741, RealPlayer 11 11.0.0 through 11.0.4, RealPlayer Enterprise, Mac RealPlayer 10 and 10.1, Linux RealPlayer 10, and Helix Player 10.x allow remote attackers to have an unspecified impact via a crafted media file that uses HTTP chunked transfer coding, related to an "overflow."
- How severe is CVE-2009-4243?
- CVE-2009-4243 has a CVSS 2.0 base score of 9.3, rated critical severity.
- Is CVE-2009-4243 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2009-4243?
- CVE-2009-4243 primarily affects Realnetworks Realplayer. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2009-4243?
- 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-2009-4243 published?
- CVE-2009-4243 was published on 2010-01-25 and last updated on 2026-06-16.
References
- http://osvdb.org/61967
- http://secunia.com/advisories/38218
- http://securitytracker.com/id?1023489
- http://service.real.com/realplayer/security/01192010_player/en/
- http://www.securityfocus.com/bid/37880
- http://www.vupen.com/english/advisories/2010/0178
- https://exchange.xforce.ibmcloud.com/vulnerabilities/55796
Affected products (18)
- cpe:2.3:a:realnetworks:realplayer:10.0:*:*:*:*:*:*:*
- cpe:2.3:a:realnetworks:realplayer:10.5:*:*:*:*:*:*:*
- cpe:2.3:a:realnetworks:realplayer:11.0:*:*:*:*:*:*:*
- cpe:2.3:a:realnetworks:realplayer:11.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:realnetworks:realplayer:11.0.2:*:*:*:*:*:*:*
- cpe:2.3:a:realnetworks:realplayer:11.0.3:*:*:*:*:*:*:*
- cpe:2.3:a:realnetworks:realplayer:11.0.4:*:*:*:*:*:*:*
- cpe:2.3:a:realnetworks:realplayer:11.0.5:*:*:*:*:*:*:*
- cpe:2.3:a:realnetworks:realplayer_enterprise:*:*:*:*:*:*:*:*
- cpe:2.3:a:realnetworks:realplayer_sp:1.0.0:*:*:*:*:*:*:*
- cpe:2.3:a:realnetworks:realplayer_sp:1.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:realnetworks:realplayer:10.1:*:*:*:*:*:*:*
- cpe:2.3:a:realnetworks:helix_player:10.0:*:*:*:*:*:*:*
- cpe:2.3:a:realnetworks:helix_player:11.0.0:*:*:*:*:*:*:*
- cpe:2.3:a:realnetworks:helix_player:11.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:realnetworks:realplayer:10.0:*:linux:*:*:*:*:*
- cpe:2.3:a:realnetworks:realplayer:11.0.0:*:linux:*:*:*:*:*
- cpe:2.3:a:realnetworks:realplayer:11.0.1:*:linux:*:*:*:*:*
More vulnerabilities in Realnetworks Realplayer
- CVE-2011-4256 — Critical (CVSS 10.0): The RV30 codec in RealNetworks RealPlayer before 15.0.0 and Mac RealPlayer before 12.0.0.1703 does not initialize an…
- CVE-2011-4255 — Critical (CVSS 10.0): Unspecified vulnerability in RealNetworks RealPlayer before 15.0.0 and Mac RealPlayer before 12.0.0.1703 allows remote…
- CVE-2011-4254 — Critical (CVSS 10.0): RealNetworks RealPlayer before 15.0.0 allows remote attackers to execute arbitrary code via a crafted RTSP SETUP…
- CVE-2011-4253 — Critical (CVSS 10.0): Unspecified vulnerability in the RV20 codec in RealNetworks RealPlayer before 15.0.0 and Mac RealPlayer before…
- CVE-2011-4250 — Critical (CVSS 10.0): Unspecified vulnerability in the ATRC codec in RealNetworks RealPlayer before 15.0.0 and Mac RealPlayer before…
- CVE-2011-4249 — Critical (CVSS 10.0): Array index error in the RV30 codec in RealNetworks RealPlayer before 15.0.0 allows remote attackers to execute…
All CVEs affecting Realnetworks Realplayer →
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