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Bug 1625832 - (CVE-2018-15911) CVE-2018-15911 ghostscript: uninitialized memory access in the aesdecode operator (699665)
CVE-2018-15911 ghostscript: uninitialized memory access in the aesdecode oper...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20180906,repor...
: Security
Depends On: 1625834 1625833
Blocks: 1619570
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Reported: 2018-09-06 01:09 EDT by Sam Fowler
Modified: 2018-10-31 21:32 EDT (History)
2 users (show)

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Doc Text:
It was discovered that ghostscript did not properly verify the key used in aesdecode. An attacker could possibly exploit this to bypass the -dSAFER protection and crash ghostscript or, possibly, execute arbitrary code in the ghostscript context via a specially crafted PostScript document.
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Description Sam Fowler 2018-09-06 01:09:34 EDT 
In Artifex Ghostscript 9.23 before 2018-08-24, attackers able to supply crafted PostScript could use uninitialized memory access in the aesdecode operator to crash the interpreter or potentially execute code.


External Reference:

https://www.kb.cert.org/vuls/id/332928


Upstream Bug:

https://bugs.ghostscript.com/show_bug.cgi?id=699665


Upstream Patch:

http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=8e9ce501
Comment 1 Sam Fowler 2018-09-06 01:10:01 EDT 
Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1625833]
Comment 4 Stefan Cornelius 2018-09-19 10:59:48 EDT 
Statement:

This issue did affect the versions of ghostscript as shipped with Red Hat Enterprise Linux 5, 6, and 7. 

Red Hat Enterprise Linux 6 is now in Maintenance Support 2 Phase of the support and maintenance life cycle. This has been rated as having a security impact of Moderate, and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

Red Hat Enterprise Linux 5 is now in Extended Life Phase of the support and maintenance life cycle. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
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