[Secure-testing-team] Bug#863018: libxml2: CVE-2017-9050

[Salvatore Bonaccorso]

Source: libxml2
Version: 2.9.4+dfsg1-2.2
Severity: important
Tags: upstream security
Forwarded: https://bugzilla.gnome.org/show_bug.cgi?id=781361

Hi,

the following vulnerability was published for libxml2.

CVE-2017-9050[0]:
| libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based
| buffer over-read in the xmlDictAddString function in dict.c. This
| vulnerability causes programs that use libxml2, such as PHP, to crash.
| This vulnerability exists because of an incomplete fix for
| CVE-2016-1839.

This corresponds to the last issue mentioned in [1], where although
the upstream bug is closed, the posting contains the issue description
and a proposed patch.

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-2017-9050
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9050
[1] http://www.openwall.com/lists/oss-security/2017/05/15/1

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore