Bug#881257: asterisk: CVE-2017-16671: AST-2017-010: Buffer overflow in CDR's set user

[Salvatore Bonaccorso]

Source: asterisk
Version: 1:13.17.2~dfsg-1
Severity: important
Tags: patch security upstream
Forwarded: https://issues.asterisk.org/jira/browse/ASTERISK-27337

Hi,

the following vulnerability was published for asterisk.

CVE-2017-16671[0]:
| A Buffer Overflow issue was discovered in Asterisk Open Source 13
| before 13.18.1, 14 before 14.7.1, and 15 before 15.1.1 and Certified
| Asterisk 13.13 before 13.13-cert7. No size checking is done when
| setting the user field for Party B on a CDR. Thus, it is possible for
| someone to use an arbitrarily large string and write past the end of
| the user field storage buffer. NOTE: this is different from
| CVE-2017-7617, which was only about the Party A buffer.

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-2017-16671
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16671
[1] https://issues.asterisk.org/jira/browse/ASTERISK-27337
[2] http://downloads.asterisk.org/pub/security/AST-2017-010.html

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore