Squirreling Backdoors Into Distribution Points
So it seems that SquirrelMail 1.4.11 and 1.4.12 were recently backdoored. Similar to some high-profile backdoors in the past, this was done by modifying the distribution tarball on rather than infiltrating the source code repository [1] . In this case, the backdoor was detected when a user noticed that the MD5 published on SquirrelMails website...





