Bug 1773683 (CVE-2019-17402) - CVE-2019-17402 exiv2: out-of-bounds read in CiffDirectory::readDirectory due to lack of size check
Summary: CVE-2019-17402 exiv2: out-of-bounds read in CiffDirectory::readDirectory due ...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-17402
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1773684 1775695 1775696 1954494
Blocks: 1773685
TreeView+ depends on / blocked
 
Reported: 2019-11-18 17:47 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-05-18 14:49 UTC (History)
4 users (show)

Fixed In Version: exiv2 0.27.3
Clone Of:
Environment:
Last Closed: 2020-09-29 21:58:53 UTC
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:4030 0 None None None 2020-09-29 20:42:47 UTC

Description Guilherme de Almeida Suckevicz 2019-11-18 17:47:30 UTC 
Exiv2 0.27.2 allows attackers to trigger a crash in Exiv2::getULong in types.cpp when called from Exiv2::Internal::CiffDirectory::readDirectory in crwimage_int.cpp, because there is no validation of the relationship of the total size to the offset and size.

Reference:
http://github.com/Exiv2/exiv2/issues/1019
Comment 1 Guilherme de Almeida Suckevicz 2019-11-18 17:47:41 UTC 
Created exiv2 tracking bugs for this issue:

Affects: fedora-all [bug 1773684]
Comment 2 Riccardo Schirone 2019-11-22 14:43:17 UTC 
Upstream patch:
http://github.com/Exiv2/exiv2/commit/88054239e3c914862d13f6ac89a19a104fa2c076 [master branch]
http://github.com/Exiv2/exiv2/commit/50e9dd964a439da357798344ed1dd86edcadf0ec [0.27-maintanance branch]

Opened upstream issue to discuss improving the fix:
http://github.com/Exiv2/exiv2/issues/1026
Comment 3 Riccardo Schirone 2019-11-22 15:24:19 UTC 
No release yet includes the fix.
Comment 4 Riccardo Schirone 2019-11-22 15:27:06 UTC 
Function CiffDirectory::readDirectory(), called by CiffDirectory::doRead(), assumes that the buffer `pData` is at least `size` bytes large. This is not always true, as the `size` value is read from the image itself (in CiffComponent::doRead() function) and there are not enough checks to ensure this holds true.
Comment 9 errata-xmlrpc 2020-09-29 20:42:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:4030 http://access.redhat.com/errata/RHSA-2020:4030
Comment 10 Product Security DevOps Team 2020-09-29 21:58:53 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

http://access.redhat.com/security/cve/cve-2019-17402
Comment 12 errata-xmlrpc 2021-05-18 14:49:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:1758 http://access.redhat.com/errata/RHSA-2021:1758
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