[Secure-testing-team] Bug#863019: libxml2: CVE-2017-9049: heap-based buffer overflow in xmlDictComputeFastKey

[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=781205

Hi,

the following vulnerability was published for libxml2.

CVE-2017-9049[0]:
| libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based
| buffer over-read in the xmlDictComputeFastKey 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 libxml2 Bug
| 759398.

As per [1] this corresponds to (a yet closed) upstream report [2]. The
[1] posting contains a proposed patch (which is not yet upstream
acked).

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-2017-9049
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9049
[1] http://www.openwall.com/lists/oss-security/2017/05/15/1
[2] https://bugzilla.gnome.org/show_bug.cgi?id=781205

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore