8000 Last-minute updates for release notes. · linearregression/postgres@c508194 · GitHub
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Last-minute updates for release notes.
Security: CVE-2016-5423, CVE-2016-5424
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‎doc/src/sgml/release-9.1.sgml

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<itemizedlist>
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<listitem>
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<para>
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Fix possible mis-evaluation of
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nested <literal>CASE</>-<literal>WHEN</> expressions (Heikki
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Linnakangas, Michael Paquier, Tom Lane)
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</para>
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<para>
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A <literal>CASE</> expression appearing within the test value
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subexpression of another <literal>CASE</> could become confused about
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whether its own test value was null or not. Also, inlining of a SQL
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function implementing the equality operator used by
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a <literal>CASE</> expression could result in passing the wrong test
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value to functions called within a <literal>CASE</> expression in the
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SQL function's body. If the test values were of different data
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types, a crash might result; moreover such situations could be abused
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to allow disclosure of portions of server memory. (CVE-2016-5423)
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</para>
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</listitem>
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<listitem>
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<para>
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Fix client programs' handling of special characters in database and
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role names (Noah Misch, Nathan Bossart, Michael Paquier)
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</para>
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<para>
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Numerous places in <application>vacuumdb</> and other client programs
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could become confused by database and role names containing double
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quotes or backslashes. Tighten up quoting rules to make that safe.
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Also, ensure that when a conninfo string is used as a database name
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parameter to these programs, it is correctly treated as such throughout.
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</para>
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<para>
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Fix handling of paired double quotes
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in <application>psql</>'s <command>\connect</>
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and <command>\password</> commands to match the documentation.
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</para>
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<para>
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Introduce a new <option>-reuse-previous</> option
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in <application>psql</>'s <command>\connect</> command to allow
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explicit control of whether to re-use connection parameters from a
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previous connection. (Without this, the choice is based on whether
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the database name looks like a conninfo string, as before.) This
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allows secure handling of database names containing special
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characters in <application>pg_dumpall</> scripts.
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</para>
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<para>
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<application>pg_dumpall</> now refuses to deal with database and role
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names containing carriage returns or newlines, as it seems impractical
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to quote those characters safely on Windows. In future we may reject
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such names on the server side, but that step has not been taken yet.
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</para>
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<para>
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These are considered security fixes because crafted object names
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containing special characters could have been used to execute
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commands with superuser privileges the next time a superuser
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executes <application>pg_dumpall</> or other routine maintenance
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operations. (CVE-2016-5424)
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</para>
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</listitem>
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<listitem>
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<para>
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Fix corner-case misbehaviors for <literal>IS NULL</>/<literal>IS NOT
@@ -77,6 +143,20 @@
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</para>
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</listitem>
79145

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<listitem>
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<para>
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Fix several one-byte buffer over-reads in <function>to_number()</>
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(Peter Eisentraut)
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</para>
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<para>
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In several cases the <function>to_number()</> function would read one
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more character than it should from the input string. There is a
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small chance of a crash, if the input happens to be adjacent to the
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end of memory.
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</para>
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</listitem>
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<listitem>
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<para>
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Avoid unsafe intermediate state during expensive paths

‎doc/src/sgml/release-9.2.sgml

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<itemizedlist>
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<listitem>
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<para>
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Fix possible mis-evaluation of
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nested <literal>CASE</>-<literal>WHEN</> expressions (Heikki
41+
Linnakangas, Michael Paquier, Tom Lane)
42+
</para>
43+
44+
<para>
45+
A <literal>CASE</> expression appearing within the test value
46+
subexpression of another <literal>CASE</> could become confused about
47+
whether its own test value was null or not. Also, inlining of a SQL
48+
function implementing the equality operator used by
49+
a <literal>CASE</> expression could result in passing the wrong test
50+
value to functions called within a <literal>CASE</> expression in the
51+
SQL function's body. If the test values were of different data
52+
types, a crash might result; moreover such situations could be abused
53+
to allow disclosure of portions of server memory. (CVE-2016-5423)
54+
</para>
55+
</listitem>
56+
57+
<listitem>
58+
<para>
59+
Fix client programs' handling of special characters in database and
60+
role names (Noah Misch, Nathan Bossart, Michael Paquier)
61+
</para>
62+
63+
<para>
64+
Numerous places in <application>vacuumdb</> and other client programs
65+
could become confused by database and role names containing double
66+
quotes or backslashes. Tighten up quoting rules to make that safe.
67+
Also, ensure that when a conninfo string is used as a database name
68+
parameter to these programs, it is correctly treated as such throughout.
69+
</para>
70+
71+
<para>
72+
Fix handling of paired double quotes
73+
in <application>psql</>'s <command>\connect</>
74+
and <command>\password</> commands to match the documentation.
75+
</para>
76+
77+
<para>
78+
Introduce a new <option>-reuse-previous</> option
79+
in <application>psql</>'s <command>\connect</> command to allow
80+
explicit control of whether to re-use connection parameters from a
81+
previous connection. (Without this, the choice is based on whether
82+
the database name looks like a conninfo string, as before.) This
83+
allows secure handling of database names containing special
84+
characters in <application>pg_dumpall</> scripts.
85+
</para>
86+
87+
<para>
88+
<application>pg_dumpall</> now refuses to deal with database and role
89+
names containing carriage returns or newlines, as it seems impractical
90+
to quote those characters safely on Windows. In future we may reject
91+
such names on the server side, but that step has not been taken yet.
92+
</para>
93+
94+
<para>
95+
These are considered security fixes because crafted object names
96+
containing special characters could have been used to execute
97+
commands with superuser privileges the next time a superuser
98+
executes <application>pg_dumpall</> or other routine maintenance
99+
operations. (CVE-2016-5424)
100+
</para>
101+
</listitem>
102+
37103
<listitem>
38104
<para>
39105
Fix corner-case misbehaviors for <literal>IS NULL</>/<literal>IS NOT
@@ -71,6 +137,20 @@
71137
</para>
72138
</listitem>
73139

140+
<listitem>
141+
<para>
142+
Fix several one-byte buffer over-reads in <function>to_number()</>
143+
(Peter Eisentraut)
144+
</para>
145+
146+
<para>
147+
In several cases the <function>to_number()</> function would read one
148+
more character than it should from the input string. There is a
149+
small chance of a crash, if the input happens to be adjacent to the
150+
end of memory.
151+
</para>
152+
</listitem>
153+
74154
<listitem>
75155
<para>
76156
Avoid unsafe intermediate state during expensive paths

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