CVE-2009-20007
CVE-2009-20007 is a critical-severity vulnerability with a CVSS 4.0 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-121.
Key facts
- Severity: Critical (CVSS 4.0 base score 9.3)
- EPSS exploit prediction: 2% (74th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2009-5125
- Weakness: CWE-121
- Published:
- Last modified:
Description
Talkative IRC v0.4.4.16 is vulnerable to a stack-based buffer overflow when processing specially crafted response strings sent to a connected client. An attacker can exploit this flaw by sending an overly long message that overflows a fixed-length buffer, potentially leading to arbitrary code execution in the context of the vulnerable process. This vulnerability is exploitable remotely and does not require authentication.
Frequently asked questions
- What is CVE-2009-20007?
- Talkative IRC v0.4.4.16 is vulnerable to a stack-based buffer overflow when processing specially crafted response strings sent to a connected client. An attacker can exploit this flaw by sending an overly long message that overflows a fixed-length buffer, potentially leading to arbitrary code execution in the context of the vulnerable process. This vulnerability is exploitable remotely and does not require authentication.
- How severe is CVE-2009-20007?
- CVE-2009-20007 has a CVSS 4.0 base score of 9.3, rated critical severity.
- Is CVE-2009-20007 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2009-20007?
- 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.
- Does CVE-2009-20007 have an EU (EUVD) identifier?
- Yes. CVE-2009-20007 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2009-5125.
- When was CVE-2009-20007 published?
- CVE-2009-20007 was published on 2025-09-16 and last updated on 2026-06-16.
References
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/misc/talkative_response.rb
- https://web.archive.org/web/20090116203306/http://www.talkative-irc.com/
- https://www.exploit-db.com/exploits/16459
- https://www.exploit-db.com/exploits/8227
- https://www.vulncheck.com/advisories/talkative-irc-response-buffer-overflow
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2009-4909.php
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