fetchmail 6.3.8 and earlier, when running in -v -v (aka verbose) mode,
allows remote attackers to cause a denial of service (crash and
persistent mail failure) via a malformed mail message with long
headers, which triggers an erroneous dereference when using vsnprintf
to format log messages.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
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