CVE-2009-4171 EXPLOIT
4.3
MEDIUM · CVSS 2.0 · EPSS 5.1% (pctl 92)
Patch early
A public exploit exists.
Description
An ActiveX control in YahooBridgeLib.dll for Yahoo! Messenger 9.0.0.2162, and possibly other 9.0 versions, allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) by calling the RegisterMe method with a long argument.
Scoring
| CVSS | 4.3 (MEDIUM, v2.0) |
|---|---|
| Vector | AV:N/AC:M/Au:N/C:N/I:N/A:P |
| EPSS | 5.09% — more likely to be exploited than 92% of all CVEs |
| Weakness | CWE-119 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2009-12-02 |
| Last modified | 2026-06-16 |
Affected (1)
| Vendor | Product |
|---|---|
| yahoo | messenger |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Yahoo! Messenger 9.0.0.2162 - 'YahooBridgeLib.dll' ActiveX Control Remote Denial of Service | 2009-11-12 |
| exploit-db | Yahoo! Messenger 9 - 'YahooBridgeLib.dll' ActiveX Control Remote Denial of Service | 2009-11-12 |
References
- http://www.securityfocus.com/archive/1/507818/100/0/threaded
- http://www.securityfocus.com/bid/37007
- https://exchange.xforce.ibmcloud.com/vulnerabilities/54263
- http://www.securityfocus.com/archive/1/507818/100/0/threaded
- http://www.securityfocus.com/bid/37007
- https://exchange.xforce.ibmcloud.com/vulnerabilities/54263
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