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exim -- two buffer overflow vulnerabilities

Description:

1. The function host_aton() can overflow a buffer if it is presented with an illegal IPv6 address that has more than 8 components.

2. The second report described a buffer overflow in the function spa_base64_to_bits(), which is part of the code for SPA authentication.

References:

Affects:

portaudit: exim -- two buffer overflow vulnerabilities

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Oliver Eikemeier <eik@FreeBSD.org>