Bug 1487128 (CVE-2017-11695) - CVE-2017-11695 nss: Heap-buffer-overflow in alloc_segs
Summary: CVE-2017-11695 nss: Heap-buffer-overflow in alloc_segs
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2017-11695
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:
Blocks: 1487134
TreeView+ depends on / blocked
 
Reported: 2017-08-31 09:52 UTC by Andrej Nemec
Modified: 2021-02-17 01:39 UTC (History)
7 users (show)

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Last Closed: 2017-09-08 04:38:03 UTC
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Description Andrej Nemec 2017-08-31 09:52:32 UTC 
A heap-buffer-overflow (write of size 8) in alloc_segs (lib/dbm/src/hash.c:1105) was found in nss.

Upstream bug:

https://bugzilla.mozilla.org/show_bug.cgi?id=1360782
Comment 1 Andrej Nemec 2017-08-31 09:57:41 UTC 
References:

http://seclists.org/fulldisclosure/2017/Aug/17
Comment 2 Huzaifa S. Sidhpurwala 2017-09-08 04:38:16 UTC 
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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