Mandrake Linux Security Advisory : proftpd (MDKSA-2006:217-1)
Critical Nessus Plugin ID 24602
SynopsisThe remote Mandrake Linux host is missing one or more security updates.
DescriptionA stack-based buffer overflow in the sreplace function in ProFTPD 1.3.0 and earlier, allows remote attackers to cause a denial of service, as demonstrated by vd_proftpd.pm, a 'ProFTPD remote exploit.' (CVE-2006-5815)
Buffer overflow in the tls_x509_name_oneline function in the mod_tls module, as used in ProFTPD 1.3.0a and earlier, and possibly other products, allows remote attackers to execute arbitrary code via a large data length argument, a different vulnerability than CVE-2006-5815. (CVE-2006-6170)
ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when CommandBufferSize is specified in the configuration file, which leads to an off-by-two buffer underflow. NOTE: in November 2006, the role of CommandBufferSize was originally associated with CVE-2006-5815, but this was an error stemming from an initial vague disclosure. NOTE: ProFTPD developers dispute this issue, saying that the relevant memory location is overwritten by assignment before further use within the affected function, so this is not a vulnerability. (CVE-2006-6171)
Packages have been patched to correct these issues.
The previous update incorrectly linked the vd_proftd.pm issue with the CommandBufferSize issue. These are two distinct issues and the previous update only addressed CommandBufferSize (CVE-2006-6171), and the mod_tls issue (CVE-2006-6170).
SolutionUpdate the affected packages.