iDEFENSE Security Advisory 08.16.04: Remote exploitation of an information disclosure vulnerability in Concurrent Versions Systems (CVS) allows attackers to glean information. The vulnerability exists within an undocumented switch to the history command implemented in src/history.c. The -X command specifies the name of the history file allowing an attacker to determine whether arbitrary system files and directories exist and whether or not the CVS process has access to them. This issue was patched in the latest (June 9th) releases of CVS, specifically 1.11.17 and 1.12.9.
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