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guix/gnu/packages/patches/pcre2-CVE-2016-3191.patch
Leo Famulari ccda7c8317
gnu: pcre2: Fix CVE-2016-3191. 
* gnu/packages/patches/pcre2-CVE-2016-3191.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/pcre.scm (pcre2): Use it.
2016-05-29 23:57:31 -04:00

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Fixes CVE-2016-3191 (remote execution of arbitrary code or denial of
service (stack-based buffer overflow) via a crafted regular expression).
See <https://bugzilla.redhat.com/show_bug.cgi?id=1311503>.
This is svn r489 at <svn://vcs.exim.org/pcre2/code>, omitting the
changes to 'testdata/testoutput8-16-4', which does not exist in the
source tarball.
git-svn-id: svn://vcs.exim.org/pcre2/code/trunk@489 6239d852-aaf2-0410-a92c-79f79f948069
---
ChangeLog | 4 ++++
src/pcre2_compile.c | 16 ++++++++++++++--
testdata/testinput8 | 2 ++
testdata/testoutput8-16-2 | 3 +++
testdata/testoutput8-16-3 | 3 +++
testdata/testoutput8-16-4 | 3 +++
testdata/testoutput8-32-2 | 3 +++
testdata/testoutput8-32-3 | 3 +++
testdata/testoutput8-32-4 | 3 +++
testdata/testoutput8-8-2 | 3 +++
testdata/testoutput8-8-3 | 3 +++
testdata/testoutput8-8-4 | 3 +++
12 files changed, 47 insertions(+), 2 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index 3ce0207..65e333e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -58,6 +58,10 @@ some head-scratching the next time this happens.
assertion, caused pcre2test to output a very large number of spaces when the
callout was taken, making the program appearing to loop.
+12. A pattern that included (*ACCEPT) in the middle of a sufficiently deeply
+nested set of parentheses of sufficient size caused an overflow of the
+compiling workspace (which was diagnosed, but of course is not desirable).
+
Version 10.21 12-January-2016
-----------------------------
diff --git a/src/pcre2_compile.c b/src/pcre2_compile.c
index e33d620..887fbfd 100644
--- a/src/pcre2_compile.c
+++ b/src/pcre2_compile.c
@@ -5901,10 +5901,22 @@ for (;; ptr++)
goto FAILED;
}
cb->had_accept = TRUE;
+
+ /* In the first pass, just accumulate the length required;
+ otherwise hitting (*ACCEPT) inside many nested parentheses can
+ cause workspace overflow. */
+
for (oc = cb->open_caps; oc != NULL; oc = oc->next)
{
- *code++ = OP_CLOSE;
- PUT2INC(code, 0, oc->number);
+ if (lengthptr != NULL)
+ {
+ *lengthptr += CU2BYTES(1) + IMM2_SIZE;
+ }
+ else
+ {
+ *code++ = OP_CLOSE;
+ PUT2INC(code, 0, oc->number);
+ }
}
setverb = *code++ =
(cb->assert_depth > 0)? OP_ASSERT_ACCEPT : OP_ACCEPT;
diff --git a/testdata/testinput8 b/testdata/testinput8
index ca3b1b9..7e2a1f0 100644
--- a/testdata/testinput8
+++ b/testdata/testinput8
@@ -182,4 +182,6 @@
/((?1)(?2)(?3)(?4)(?5)(?6)(?7)(?8)(?9)(?9)(?8)(?7)(?6)(?5)(?4)(?3)(?2)(?1)(?0)){2,}()()()()()()()()()/debug
+/([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00](*ACCEPT)/
+
# End of testinput8
diff --git a/testdata/testoutput8-16-2 b/testdata/testoutput8-16-2
index 05669bb..a5e8dec 100644
--- a/testdata/testoutput8-16-2
+++ b/testdata/testoutput8-16-2
@@ -1027,4 +1027,7 @@ Capturing subpattern count = 10
May match empty string
Subject length lower bound = 0
+/([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00](*ACCEPT)/
+Failed: error 186 at offset 490: regular expression is too complicated
+
# End of testinput8
diff --git a/testdata/testoutput8-16-3 b/testdata/testoutput8-16-3
index 31884e1..36133b3 100644
--- a/testdata/testoutput8-16-3
+++ b/testdata/testoutput8-16-3
@@ -1023,4 +1023,7 @@ Capturing subpattern count = 10
May match empty string
Subject length lower bound = 0
+/([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00](*ACCEPT)/
+Failed: error 114 at offset 509: missing closing parenthesis
+
# End of testinput8
diff --git a/testdata/testoutput8-32-2 b/testdata/testoutput8-32-2
index babd0c7..99c4fad 100644
--- a/testdata/testoutput8-32-2
+++ b/testdata/testoutput8-32-2
@@ -1023,4 +1023,7 @@ Capturing subpattern count = 10
May match empty string
Subject length lower bound = 0
+/([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00](*ACCEPT)/
+Failed: error 114 at offset 509: missing closing parenthesis
+
# End of testinput8
diff --git a/testdata/testoutput8-32-3 b/testdata/testoutput8-32-3
index babd0c7..99c4fad 100644
--- a/testdata/testoutput8-32-3
+++ b/testdata/testoutput8-32-3
@@ -1023,4 +1023,7 @@ Capturing subpattern count = 10
May match empty string
Subject length lower bound = 0
+/([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00](*ACCEPT)/
+Failed: error 114 at offset 509: missing closing parenthesis
+
# End of testinput8
diff --git a/testdata/testoutput8-32-4 b/testdata/testoutput8-32-4
index babd0c7..99c4fad 100644
--- a/testdata/testoutput8-32-4
+++ b/testdata/testoutput8-32-4
@@ -1023,4 +1023,7 @@ Capturing subpattern count = 10
May match empty string
Subject length lower bound = 0
+/([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00](*ACCEPT)/
+Failed: error 114 at offset 509: missing closing parenthesis
+
# End of testinput8
diff --git a/testdata/testoutput8-8-2 b/testdata/testoutput8-8-2
index 6a9aa0a..6dc1f42 100644
--- a/testdata/testoutput8-8-2
+++ b/testdata/testoutput8-8-2
@@ -1026,4 +1026,7 @@ Capturing subpattern count = 10
May match empty string
Subject length lower bound = 0
+/([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00](*ACCEPT)/
+Failed: error 114 at offset 509: missing closing parenthesis
+
# End of testinput8
diff --git a/testdata/testoutput8-8-3 b/testdata/testoutput8-8-3
index 2fe1168..ae14946 100644
--- a/testdata/testoutput8-8-3
+++ b/testdata/testoutput8-8-3
@@ -1024,4 +1024,7 @@ Capturing subpattern count = 10
May match empty string
Subject length lower bound = 0
+/([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00](*ACCEPT)/
+Failed: error 114 at offset 509: missing closing parenthesis
+
# End of testinput8
diff --git a/testdata/testoutput8-8-4 b/testdata/testoutput8-8-4
index 91993b2..6c79956 100644
--- a/testdata/testoutput8-8-4
+++ b/testdata/testoutput8-8-4
@@ -1022,4 +1022,7 @@ Capturing subpattern count = 10
May match empty string
Subject length lower bound = 0
+/([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00](*ACCEPT)/
+Failed: error 114 at offset 509: missing closing parenthesis
+
# End of testinput8
--
2.8.3
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