Bug 1632834 (CVE-2018-17294) - CVE-2018-17294 liblouis: Stack-based buffer over-read in matchCurrentInput function lou_translateString.c
Summary: CVE-2018-17294 liblouis: Stack-based buffer over-read in matchCurrentInput fu...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-17294
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: 1632836 1632837
Blocks: 1632835
TreeView+ depends on / blocked
 
Reported: 2018-09-25 15:58 UTC by Pedro Sampaio
Modified: 2021-10-25 22:19 UTC (History)
2 users (show)

Fixed In Version: liblouis 3.7
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Environment:
Last Closed: 2021-10-25 22:19:19 UTC
Embargoed:

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Description Pedro Sampaio 2018-09-25 15:58:51 UTC 
The matchCurrentInput function inside lou_translateString.c of Liblouis prior to 3.7 does not check the input string's length, allowing attackers to cause a denial of service (application crash via out-of-bounds read) by crafting an input file with certain translation dictionaries.

Upstream patch:

https://github.com/liblouis/liblouis/commit/5e4089659bb49b3095fa541fa6387b4c40d7396e

Upstream issue:

https://github.com/liblouis/liblouis/issues/635
Comment 1 Pedro Sampaio 2018-09-25 15:59:50 UTC 
Created liblouis tracking bugs for this issue:

Affects: fedora-all [bug 1632836]
Comment 3 Scott Gayou 2018-10-30 21:26:20 UTC 
Rebuilt with ASAN. No crashes, no errors. Same with Valgrind. Source has similar potentially vulnerable code, i.e. matchcurrentInput, but since this didn't trigger and is low, closing as NOTAFFECTED instead of going deeper into this.
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