Bug 1561699 – CVE-2018-9055 jasper: reachable assertion in jpc_firstone() in jpc_math.c

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Bug 1561699 - (CVE-2018-9055) CVE-2018-9055 jasper: reachable assertion in jpc_firstone() in jpc_math.c

Summary:	CVE-2018-9055 jasper: reachable assertion in jpc_firstone() in jpc_math.c

Status:	NEW

Aliases:	CVE-2018-9055

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
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Assigned To:	Red Hat Product Security
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Whiteboard:	impact=low,public=20180326,reported=2...
Keywords:	Security

Depends On:	1561700 1561701 1561702 1563977 1563978 1563979
Blocks:	1561703
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Reported:	2018-03-28 13:41 EDT by Laura Pardo
Modified:	2018-07-18 11:53 EDT (History)
CC List:	18 users (show)

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Description Laura Pardo 2018-03-28 13:41:01 EDT

JasPer 2.0.14 allows denial of service via a reachable assertion in the function jpc_firstone in libjasper/jpc/jpc_math.c which could lead to a denial of service attack.


References:
https://github.com/mdadams/jasper/issues/172

Comment 1 Laura Pardo 2018-03-28 13:41:46 EDT

Created mingw-jasper tracking bugs for this issue:

Affects: fedora-all [bug 1561702]


Created jasper tracking bugs for this issue:

Affects: fedora-all [bug 1561700]


Created mingw-jasper tracking bugs for this issue:

Affects: epel-7 [bug 1561701]

Comment 2 Doran Moppert 2018-04-05 02:21:02 EDT

The vulnerability was introduced just prior to 1.900.19, with the conversion of some local variables from `int` to `jpc_fix_t`, which can be larger than 32 bits.

Comment 3 Doran Moppert 2018-04-05 02:34:43 EDT

In reply to comment 2:
> The vulnerability was introduced just prior to 1.900.19,

Correction:  the particular instance of the vulnerability shown in the upstream report's stack trace was introduced in this version.  jpc_firstone() is used quite widely in the code base, and other conversions to jpc_fix_t (eg in jpc/jpc_enc.c) using data from the input file could trigger the same assertion.  Applying the upstream patch which converts jpc_firstone(int) to jpc_firstone(int_fast32_t) corrects all of these cases.

Comment 4 Doran Moppert 2018-04-05 02:42:16 EDT

Statement:

The following products are now in Extended Life Phase of the support and maintenance life cycle. This issue is not currently planned to be addressed in future updates of these products.
* Red Hat Enterprise Linux 5
* Red Hat Enterprise Virtualization 3
For additional information, please refer to the Life Cycle and Update Policies:  https://access.redhat.com/support/policy/update_policies/

Comment 6 Tomas Hoger 2018-05-29 10:14:30 EDT

This issue affects the latest released jasper 2.0.14, and not fix has been applied upstream, even though reporter already closed the upstream bug.

This assertion is triggered during image encoding, e.g. when converting a specially-crafted image to a different format using jasper.  This lowers impact of this issue.

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