Vulnerability identifier: #VU31350

Vulnerability risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2017-7376

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Libxml2
Universal components / Libraries / Libraries used by multiple products

Vendor: Gnome Development Team

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Buffer overflow in libxml2 allows remote attackers to execute arbitrary code by leveraging an incorrect limit for port values when handling redirects.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Libxml2: 2.9.0 - 2.9.4-16-g0741801

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External links
http://www.securityfocus.com/bid/98877
http://www.securitytracker.com/id/1038623
http://android.googlesource.com/platform/external/libxml2/+/51e0cb2e5ec18eaf6fb331bc573ff27b743898f4
http://bugzilla.redhat.com/show_bug.cgi?id=1462216
http://git.gnome.org/browse/libxml2/commit/?id=5dca9eea1bd4263bfa4d037ab2443de1cd730f7e
http://source.android.com/security/bulletin/2017-06-01
http://www.debian.org/security/2017/dsa-3952

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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. However, proof of concept for this vulnerability is available.