CVE-2009-4247: realnetworks helix_player
Vulnerability summary
CVE-2009-4247 is a high (CVSS 9.3) vulnerability in realnetworks helix_player. EPSS estimates a 6.81% chance of exploitation in the next 30 days, higher than 94% of scored vulnerabilities.
Not severe (CVSS 9.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 1Timeline
- 25-01-2010PublishedVulnerability first disclosed.
- 07-08-2024Last modifiedVulnerability information updated.
Description
Stack-based buffer overflow in protocol/rtsp/rtspclnt.cpp in RealNetworks RealPlayer 10; RealPlayer 10.5 6.0.12.1040 through 6.0.12.1741; RealPlayer 11 11.0.x; RealPlayer SP 1.0.0 and 1.0.1; RealPlayer Enterprise; Mac RealPlayer 10, 10.1, 11.0, and 11.0.1; Linux RealPlayer 10, 11.0.0, and 11.0.1; and Helix Player 10.x, 11.0.0, and 11.0.1 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via an ASM RuleBook with a large number of rules, related to an "array overflow."
CVSS metrics
1 score · 1 source · 1 versionEPSS trend
Probability
6.81%
Chance of exploitation in the next 30 days
Percentile
94%
Versus all other CVEs
30-day change
No change 0.00 pp
From 6.81% on 04-10-2026
Known exploited
Compare KEV catalogsNot in the CISA KEV catalog.
Not in the ENISA CNW catalog.
Not in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication (CVSS vector). Other conditions: not stated in public data.
Realnetworks3 products
- helix_player10.0 | 11.0.0 | 11.0.1
- realplayer10.0 | 10.5 | 11.0 | 11.0.1 | 11.0.2 | 11.0.3 | 11.0.4 | 11.0.5 | 10.1 | 11.0.0
- realplayer_sp1.0.0 | 1.0.1
1 vendor · 3 products
References
13 links- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10677VDB EntrySignatureX Refsource OVAL
- lists.helixcommunity.org/pipermail/protocol-cvs/2009-August/001943.htmlMailing ListX Refsource MLIST
- helixcommunity.org/viewcvs/protocol/rtsp/rtspclnt.cpp?view=logX Refsource CONFIRM
- lists.helixcommunity.org/pipermail/helix-client-dev/2009-August/008092.htmlMailing ListX Refsource MLIST
Show all 13 references
- bugzilla.redhat.com/show_bug.cgi?id=561338X Refsource CONFIRM