[Secure-testing-team] Bug#874754: libbson: CVE-2017-14227

[Salvatore Bonaccorso]

Source: libbson
Version: 1.7.0-1
Severity: important
Tags: security upstream

Hi,

the following vulnerability was published for libbson.

CVE-2017-14227[0]:
| In MongoDB libbson 1.7.0, the bson_iter_codewscope function in
| bson-iter.c miscalculates a bson_utf8_validate length argument, which
| allows remote attackers to cause 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.

The following shows the problem using the example bson-metrics:

00000000  15 00 00 00 0f 00 0e 00  00 00 00 00 00 00 06 00  |................|
00000010  00 00 00 00 00 00 03 e8  88 88 00 00              |............|
0000001c

cf. [1].

If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2017-14227
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-14227
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1489355

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore