Bug 1487129 – CVE-2017-11696 nss: Heap-buffer-overflow in __hash_open

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Bug 1487129 - (CVE-2017-11696) CVE-2017-11696 nss: Heap-buffer-overflow in __hash_open

Summary:	CVE-2017-11696 nss: Heap-buffer-overflow in __hash_open

Status:	CLOSED NOTABUG

Aliases:	CVE-2017-11696

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=20170809,reported=2...
Keywords:	Security

Depends On:
Blocks:	1487134
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Reported:	2017-08-31 05:53 EDT by Andrej Nemec
Modified:	2017-09-08 00:40 EDT (History)
CC List:	7 users (show)

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Last Closed:	2017-09-08 00:39:58 EDT
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Description Andrej Nemec 2017-08-31 05:53:30 EDT

A heap-buffer-overflow (write of size 65544) in __hash_open (lib/dbm/src/hash.c:241) was found in nss.

Upstream bug:

https://bugzilla.mozilla.org/show_bug.cgi?id=1360778

Comment 1 Andrej Nemec 2017-08-31 05:57:56 EDT

References:

http://seclists.org/fulldisclosure/2017/Aug/17

Comment 2 Huzaifa S. Sidhpurwala 2017-09-08 00:40:10 EDT

Statement:

NSS uses a local DBM database to store configuration and security (Certificates etc) information. These database files are created by NSS during startup and is used during its normal operation. These files are not read/retrieved from an external source. This flaw is related to specially-crafted NSS DBM files. So the only way to exploit this flaw is to replace the local NSS db with these files which require local user access on the machine running NSS. Therefore Red Hat Product Security does not consider this as a security flaw.

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