Bug 224607 (CVE-2007-0455)

Summary: CVE-2007-0455 gd: buffer overrun
Product: [Other] Security Response Reporter: Josh Bressers <bressers>
Component: vulnerabilityAssignee: Jiri Moskovcak <jmoskovc>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: dfediuck, jlieskov, kreilly, rbiba
Target Milestone: ---Keywords: Reopened, Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-01-07 08:19:26 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 432784, 432785, 432786, 432787, 833899    
Bug Blocks:    

Description Josh Bressers 2007-01-26 17:44:01 UTC
Kees Cook from Ubuntu reported a "off-the-end-of-string increment", which could
theoretically lead ot a buffer overflow.

This flaw would only be exploitable if a JIS-encoded font is used when
processing a special malicious string.

The issue here is that the NULL terminator is incremented, which could lead to
unknown results during the processing of the malicious string.

Index: gdft.c
===================================================================
RCS file: /repository/gd/libgd/gdft.c,v
retrieving revision 1.28
diff -u -p -r1.28 gdft.c
--- gdft.c      3 Jan 2007 21:21:21 -0000       1.28
+++ gdft.c      24 Jan 2007 23:00:55 -0000
@@ -1178,7 +1178,7 @@ fprintf(stderr,"dpi=%d,%d metric_res=%d 
                {
                  ch = c & 0xFF;        /* don't extend sign */
                }
-             next++;
+             if (*next) next++;
            }
            break;
          case gdFTEX_Big5:

Comment 1 Josh Bressers 2007-01-26 17:44:55 UTC
This flaw does not affect gd as shipped in RHEL2.1 or RHEL3.

Comment 2 Josh Bressers 2007-01-26 17:48:16 UTC
This flaw also affects RHEL5.  Once we can assign bugs to that version, I'll
move this from RHEL4.

Comment 12 Red Hat Product Security 2008-02-28 10:56:23 UTC
This issue was addressed in:

Red Hat Application Stack:
  php:
    http://rhn.redhat.com/errata/RHSA-2007-0162.html

Red Hat Enterprise Linux:
  php:
    http://rhn.redhat.com/errata/RHSA-2007-0155.html
    http://rhn.redhat.com/errata/RHSA-2007-0153.html
  gd:
    http://rhn.redhat.com/errata/RHSA-2008-0146.html