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| author | Jay Berkenbilt <ejb@ql.org> | 2017-07-26 10:30:32 +0200 |
|---|---|---|
| committer | Jay Berkenbilt <ejb@ql.org> | 2017-07-26 12:24:07 +0200 |
| commit | afe0242b263a9e1a8d51dd81e42ab6de2e5127eb (patch) | |
| tree | 959baca5eaaac2e775aee3faa35ec52a29aa81ab /ChangeLog | |
| parent | 315092dd98d5230ef0efa18b294d464d0e9f79d0 (diff) | |
| download | qpdf-afe0242b263a9e1a8d51dd81e42ab6de2e5127eb.tar.zst | |
Handle object ID 0 (fixes #99)
This is CVE-2017-9208.
The QPDF library uses object ID 0 internally as a sentinel to
represent a direct object, but prior to this fix, was not blocking
handling of 0 0 obj or 0 0 R as a special case. Creating an object in
the file with 0 0 obj could cause various infinite loops. The PDF spec
doesn't allow for object 0. Having qpdf handle object 0 might be a
better fix, but changing all the places in the code that assumes objid
== 0 means direct would be risky.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 4 |
1 files changed, 4 insertions, 0 deletions
@@ -1,5 +1,9 @@ 2017-07-26 Jay Berkenbilt <ejb@ql.org> + * CVE-2017-9208: Handle references to and appearance of object 0 + as a special case. Object 0 is not allowed, and qpdf was using it + internally to represent direct objects. + * CVE-2017-9209: Fix infinite loop caused by attempting to reconstruct the xref table while already in the process of reconstructing the xref table. |