claws-mail -- no bounds checking on the output buffer in conv_jistoeuc, conv_euctojis, conv_sjistoeuc

2015-11-04T00:00:00
ID 51358314-BEC8-11E5-82CD-BCAEC524BF84
Type freebsd
Reporter FreeBSD
Modified 2015-11-04T00:00:00

Description

DrWhax reports:

So in codeconv.c there is a function for Japanese character set conversion called conv_jistoeuc(). There is no bounds checking on the output buffer, which is created on the stack with alloca() Bug can be triggered by sending an email to TAILS_luser@riseup.net or whatever.

    Since my C is completely rusty, you might be able to make a better
    judgment on the severity of this issue. Marking critical for now.