textviewurisecuritycheck in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.

In imapscantreerecursive in Claws Mail through 3.17.6, a malicious IMAP server can trigger stack consumption because of unlimited recursion into subdirectories during a rebuild of the folder tree.

common/session.c in Claws Mail before 3.17.6 has a protocol violation because suffix data after STARTTLS is mishandled.

Claws Mail vCalendar plugin: credentials exposed on interface

In Claws Mail 3.14.1, an attacker in possession of S/MIME or PGP encrypted emails can wrap them as sub-parts within a crafted multipart email. The encrypted part(s) can further be hidden using HTML/CSS or ASCII newline characters. This modified multipart email can be re-sent by the attacker to the intended receiver. If the receiver replies to this (benign looking) email, they unknowingly leak the plaintext of the encrypted message part(s) back to the attacker.

Stack-based buffer overflow in the conveuctojis function in codeconv.c in Claws Mail 3.13.1 allows remote attackers to have unspecified impact via a crafted email, involving Japanese character set conversion. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-8614.

Multiple stack-based buffer overflows in the (1) convjistoeuc, (2) conveuctojis, and (3) convsjistoeuc functions in codeconv.c in Claws Mail before 3.13.1 allow remote attackers to have unspecified impact via a crafted email, involving Japanese character set conversion.

plugins/rssyl/feed.c in Claws Mail before 3.10.0 disables the CURLOPTSSLVERIFYHOST check for CN or SAN host name fields, which makes it easier for remote attackers to spoof servers and conduct man-in-the-middle (MITM) attacks.

Description of problem: A specific mail in the user mbox file cause claws-mail to crash reliabily.

Version-Release number of selected component: claws-mail-3.8.1-1.fc17

Additional info: libreport version: 2.0.14 abrtversion: 2.0.13 backtracerating: 4 cmdline: claws-mail crashfunction: strchr kernel: 3.5.4-2.fc17.x8664

truncated backtrace: :Thread no. 1 (10 frames) : #0 strchr at ../sysdeps/x8664/strchr.S:33 : #1 parseparameters at procmime.c:1756 : #2 procmimeparsecontentdisposition at procmime.c:1842 : #3 procmimeparsemimepart at procmime.c:1967 : #4 procmimeparsemultipart at procmime.c:1566 : #5 procmimeparsemimepart at procmime.c:1994 : #6 procmimeparsemessagerfc822 at procmime.c:1393 : #7 procmimescanfilewithoffset at procmime.c:2058 : #8 procmimescanfilefull at procmime.c:2071 : #9 procmimescanfile at procmime.c:2078