6834 : CVS serve_notify Overflow Command Execution
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2 1619 almost 10 years ago about 6 years ago 0 times 90%


Disclosure Date


A remote overflow exists in Concurrent Versions System. The CVS fails to handle an empty data line input resulting in a potential single byte overflow. With a specially crafted request, an attacker can cause the execution of the supplied code resulting in a loss of confidentiality, integrity, and/or availability. Since the CVS system is used to version control source code, these flaws put the source code in the repository at risk of being changed. This could lead to future exploits of any software that was checked into the system. These problems were discovered after a system compromise. The subsequent CVS code audit discovered several issues. This should be considered a critical issue and any source code located on public CVS servers should be verified to be correct.


Location: Local Access Required, Remote / Network Access
Attack Type: Input Manipulation, Other
Impact: Loss of Confidentiality, Loss of Integrity, Loss of Availability
Exploit: Exploit Public


Upgrade to version 1.11.17 Stable, 1.12.9 Devel or higher, as it has been reported to fix this vulnerability. Further, additional steps can be taken to help secure a CVS server.


CVS Feature Release
CVS Stable Release


Tools & Filters

12265 12500 13723 13724 13831 14157 14517 14812 15356 18779


  • Stefan Esser - sefreebsd.org -
  • Sebastian Krahmer - krahmersuse.de - SuSE
  • Derek Robert Price -

CVSSv2 Score

CVSSv2 Base Score = 10.0
Source: nvd.nist.gov | Generated: 2003-12-31 | Disagree?

Access_vector_2 Access_complexity_2 Authentication_2 Confidentiality_impact_2 Integrity_impact_2 Availability_impact_2


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