From: sms
Subject: Fix CVE-2014-8140: out-of-bounds write issue in test_compr_eb()
Bug-Debian: http://bugs.debian.org/773722

--- a/extract.c
+++ b/extract.c
@@ -2234,10 +2234,17 @@
     if (compr_offset < 4)                /* field is not compressed: */
         return PK_OK;                    /* do nothing and signal OK */
 
+    /* Return no/bad-data error status if any problem is found:
+     *    1. eb_size is too small to hold the uncompressed size
+     *       (eb_ucsize).  (Else extract eb_ucsize.)
+     *    2. eb_ucsize is zero (invalid).  2014-12-04 SMS.
+     *    3. eb_ucsize is positive, but eb_size is too small to hold
+     *       the compressed data header.
+     */
     if ((eb_size < (EB_UCSIZE_P + 4)) ||
-        ((eb_ucsize = makelong(eb+(EB_HEADSIZE+EB_UCSIZE_P))) > 0L &&
-         eb_size <= (compr_offset + EB_CMPRHEADLEN)))
-        return IZ_EF_TRUNC;               /* no compressed data! */
+     ((eb_ucsize = makelong( eb+ (EB_HEADSIZE+ EB_UCSIZE_P))) == 0L) ||
+     ((eb_ucsize > 0L) && (eb_size <= (compr_offset + EB_CMPRHEADLEN))))
+        return IZ_EF_TRUNC;             /* no/bad compressed data! */
 
     if (
 #ifdef INT_16BIT
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<tr><td><span title='2022-11-05 11:26:55 +0100'>2022-11-05</span></td><td><a href='/guix/commit/.editorconfig?id=6123f0e467aa5249f0a497c89ce434222702a535'>Add EditorConfig specification.</a><span class='msg-avail'>...</span></td><td>(</td></tr>
:24:47 +0200'>2017-09-11</span></td><td><a href='/guix/commit/gnu/system/uuid.scm?id=ce094b4663da6aa52d02f398a19e1d2892641b7d'>uuid: 'uuid' macro supports more UUID types.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-09-11 22:24:46 +0200'>2017-09-11</span></td><td><a href='/guix/commit/gnu/system/uuid.scm?id=9b336338cdc0e46a3bf7a2913c2f61cd2410c4d6'>system: Introduce a disjoint UUID type.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-09-11 22:24:46 +0200'>2017-09-11</span></td><td><a href='/guix/commit/gnu/system/uuid.scm?id=47cef4ecad54d112aa3b4bc509194d3d49a10785'>file-systems: Introduce (gnu system uuid).</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>