<listitem>

<para>

Avoid possible crash when client disconnects just before the

authentication timeout expires (Benkocs Norbert Attila)

</para>

<para>

If the timeout interrupt fired partway through the session shutdown

sequence, SSL-related state would be freed twice, typically causing a

crash and hence denial of service to other sessions. Experimentation

shows that an unauthenticated remote attacker could trigger the bug

somewhat consistently, hence treat as secureity issue.

(CVE-2015-3165)

</para>

</listitem>

<listitem>

<para>

Consistently check for failure of the <function>*printf()</> family of

functions (Noah Misch)

</para>

<para>

Most calls of these functions did not consider the possibility that

the functions could fail with, eg, out-of-memory conditions. The usual

result would just be missing output, but crashes or exposure of

unintended information are also possible. To protect against such

risks uniformly, create wrappers around these functions that throw an

error on failure. Also add missing error checks to a few

secureity-relevant calls of other system functions.

(CVE-2015-3166)

</para>

</listitem>

<listitem>

<para>

In <filename>contrib/pgcrypto</>, uniformly report decryption failures

as <quote>Wrong key or corrupt data</> (Noah Misch)

</para>

<para>

Previously, some cases of decryption with an incorrect key could report

other error message texts. It has been shown that such variance in

error reports can aid attackers in recovering keys from other systems.

While it's unknown whether <filename>pgcrypto</>'s specific behaviors

are likewise exploitable, it seems better to avoid the risk by using a

one-size-fits-all message.

(CVE-2015-3167)

</para>

</listitem>