#VU38340 Out-of-bounds read in MongoDB and libbson - CVE-2017-14227

Vulnerability identifier: #VU38340

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-14227

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MongoDB
Server applications / Database software
libbson
Universal components / Libraries / Libraries used by multiple products

Vendor: MongoDB, Inc.

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in In MongoDB libbson 1.7.0, the bson_iter_codewscope function in bson-iter.c miscalculates a bson_utf8_validate length argument, which. A remote attacker can perform a denial of service (heap-based buffer over-read in the bson_utf8_validate function in bson-utf8.c), as demonstrated by bson-to-json.c.

Mitigation
Install update from vendor's website.

Vulnerable software versions

MongoDB: 1.7.0

libbson: 1.7.0

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External links
https://www.securityfocus.com/bid/100825
https://bugzilla.redhat.com/show_bug.cgi?id=1489355
https://bugzilla.redhat.com/show_bug.cgi?id=1489356
https://bugzilla.redhat.com/show_bug.cgi?id=1489362

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.