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Last-minute updates for release notes.

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Security: CVE-2016-5423, CVE-2016-5424
This commit is contained in:
Tom Lane 2016-08-08 11:56:10 -04:00
parent 43d7a0af53
commit 43957e873d
3 changed files with 240 additions and 0 deletions
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80
doc/src/sgml/release-9.1.sgml
View File

@ -40,6 +40,72 @@
<itemizedlist>
<listitem>
<para>
Fix possible mis-evaluation of
nested <literal>CASE</>-<literal>WHEN</> expressions (Heikki
Linnakangas, Michael Paquier, Tom Lane)
</para>
<para>
A <literal>CASE</> expression appearing within the test value
subexpression of another <literal>CASE</> could become confused about
whether its own test value was null or not. Also, inlining of a SQL
function implementing the equality operator used by
a <literal>CASE</> expression could result in passing the wrong test
value to functions called within a <literal>CASE</> expression in the
SQL function's body. If the test values were of different data
types, a crash might result; moreover such situations could be abused
to allow disclosure of portions of server memory. (CVE-2016-5423)
</para>
</listitem>
<listitem>
<para>
Fix client programs' handling of special characters in database and
role names (Noah Misch, Nathan Bossart, Michael Paquier)
</para>
<para>
Numerous places in <application>vacuumdb</> and other client programs
could become confused by database and role names containing double
quotes or backslashes. Tighten up quoting rules to make that safe.
Also, ensure that when a conninfo string is used as a database name
parameter to these programs, it is correctly treated as such throughout.
</para>
<para>
Fix handling of paired double quotes
in <application>psql</>'s <command>\connect</>
and <command>\password</> commands to match the documentation.
</para>
<para>
Introduce a new <option>-reuse-previous</> option
in <application>psql</>'s <command>\connect</> command to allow
explicit control of whether to re-use connection parameters from a
previous connection. (Without this, the choice is based on whether
the database name looks like a conninfo string, as before.) This
allows secure handling of database names containing special
characters in <application>pg_dumpall</> scripts.
</para>
<para>
<application>pg_dumpall</> now refuses to deal with database and role
names containing carriage returns or newlines, as it seems impractical
to quote those characters safely on Windows. In future we may reject
such names on the server side, but that step has not been taken yet.
</para>
<para>
These are considered security fixes because crafted object names
containing special characters could have been used to execute
commands with superuser privileges the next time a superuser
executes <application>pg_dumpall</> or other routine maintenance
operations. (CVE-2016-5424)
</para>
</listitem>
<listitem>
<para>
Fix corner-case misbehaviors for <literal>IS NULL</>/<literal>IS NOT
@ -77,6 +143,20 @@
</para>
</listitem>
<listitem>
<para>
Fix several one-byte buffer over-reads in <function>to_number()</>
(Peter Eisentraut)
</para>
<para>
In several cases the <function>to_number()</> function would read one
more character than it should from the input string. There is a
small chance of a crash, if the input happens to be adjacent to the
end of memory.
</para>
</listitem>
<listitem>
<para>
Avoid unsafe intermediate state during expensive paths

80
doc/src/sgml/release-9.2.sgml
View File

@ -34,6 +34,72 @@
<itemizedlist>
<listitem>
<para>
Fix possible mis-evaluation of
nested <literal>CASE</>-<literal>WHEN</> expressions (Heikki
Linnakangas, Michael Paquier, Tom Lane)
</para>
<para>
A <literal>CASE</> expression appearing within the test value
subexpression of another <literal>CASE</> could become confused about
whether its own test value was null or not. Also, inlining of a SQL
function implementing the equality operator used by
a <literal>CASE</> expression could result in passing the wrong test
value to functions called within a <literal>CASE</> expression in the
SQL function's body. If the test values were of different data
types, a crash might result; moreover such situations could be abused
to allow disclosure of portions of server memory. (CVE-2016-5423)
</para>
</listitem>
<listitem>
<para>
Fix client programs' handling of special characters in database and
role names (Noah Misch, Nathan Bossart, Michael Paquier)
</para>
<para>
Numerous places in <application>vacuumdb</> and other client programs
could become confused by database and role names containing double
quotes or backslashes. Tighten up quoting rules to make that safe.
Also, ensure that when a conninfo string is used as a database name
parameter to these programs, it is correctly treated as such throughout.
</para>
<para>
Fix handling of paired double quotes
in <application>psql</>'s <command>\connect</>
and <command>\password</> commands to match the documentation.
</para>
<para>
Introduce a new <option>-reuse-previous</> option
in <application>psql</>'s <command>\connect</> command to allow
explicit control of whether to re-use connection parameters from a
previous connection. (Without this, the choice is based on whether
the database name looks like a conninfo string, as before.) This
allows secure handling of database names containing special
characters in <application>pg_dumpall</> scripts.
</para>
<para>
<application>pg_dumpall</> now refuses to deal with database and role
names containing carriage returns or newlines, as it seems impractical
to quote those characters safely on Windows. In future we may reject
such names on the server side, but that step has not been taken yet.
</para>
<para>
These are considered security fixes because crafted object names
containing special characters could have been used to execute
commands with superuser privileges the next time a superuser
executes <application>pg_dumpall</> or other routine maintenance
operations. (CVE-2016-5424)
</para>
</listitem>
<listitem>
<para>
Fix corner-case misbehaviors for <literal>IS NULL</>/<literal>IS NOT
@ -71,6 +137,20 @@
</para>
</listitem>
<listitem>
<para>
Fix several one-byte buffer over-reads in <function>to_number()</>
(Peter Eisentraut)
</para>
<para>
In several cases the <function>to_number()</> function would read one
more character than it should from the input string. There is a
small chance of a crash, if the input happens to be adjacent to the
end of memory.
</para>
</listitem>
<listitem>
<para>
Avoid unsafe intermediate state during expensive paths

80
doc/src/sgml/release-9.3.sgml
View File

@ -34,6 +34,72 @@
<itemizedlist>
<listitem>
<para>
Fix possible mis-evaluation of
nested <literal>CASE</>-<literal>WHEN</> expressions (Heikki
Linnakangas, Michael Paquier, Tom Lane)
</para>
<para>
A <literal>CASE</> expression appearing within the test value
subexpression of another <literal>CASE</> could become confused about
whether its own test value was null or not. Also, inlining of a SQL
function implementing the equality operator used by
a <literal>CASE</> expression could result in passing the wrong test
value to functions called within a <literal>CASE</> expression in the
SQL function's body. If the test values were of different data
types, a crash might result; moreover such situations could be abused
to allow disclosure of portions of server memory. (CVE-2016-5423)
</para>
</listitem>
<listitem>
<para>
Fix client programs' handling of special characters in database and
role names (Noah Misch, Nathan Bossart, Michael Paquier)
</para>
<para>
Numerous places in <application>vacuumdb</> and other client programs
could become confused by database and role names containing double
quotes or backslashes. Tighten up quoting rules to make that safe.
Also, ensure that when a conninfo string is used as a database name
parameter to these programs, it is correctly treated as such throughout.
</para>
<para>
Fix handling of paired double quotes
in <application>psql</>'s <command>\connect</>
and <command>\password</> commands to match the documentation.
</para>
<para>
Introduce a new <option>-reuse-previous</> option
in <application>psql</>'s <command>\connect</> command to allow
explicit control of whether to re-use connection parameters from a
previous connection. (Without this, the choice is based on whether
the database name looks like a conninfo string, as before.) This
allows secure handling of database names containing special
characters in <application>pg_dumpall</> scripts.
</para>
<para>
<application>pg_dumpall</> now refuses to deal with database and role
names containing carriage returns or newlines, as it seems impractical
to quote those characters safely on Windows. In future we may reject
such names on the server side, but that step has not been taken yet.
</para>
<para>
These are considered security fixes because crafted object names
containing special characters could have been used to execute
commands with superuser privileges the next time a superuser
executes <application>pg_dumpall</> or other routine maintenance
operations. (CVE-2016-5424)
</para>
</listitem>
<listitem>
<para>
Fix corner-case misbehaviors for <literal>IS NULL</>/<literal>IS NOT
@ -78,6 +144,20 @@
</para>
</listitem>
<listitem>
<para>
Fix several one-byte buffer over-reads in <function>to_number()</>
(Peter Eisentraut)
</para>
<para>
In several cases the <function>to_number()</> function would read one
more character than it should from the input string. There is a
small chance of a crash, if the input happens to be adjacent to the
end of memory.
</para>
</listitem>
<listitem>
<para>
Do not run the planner on the query contained in <literal>CREATE