Buffer overflow in PostgreSQL

1) Buffer overflow

EUVDB-ID: #VU32339

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-0773

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

PostgreSQL before 9.1.20, 9.2.x before 9.2.15, 9.3.x before 9.3.11, 9.4.x before 9.4.6, and 9.5.x before 9.5.1 allows remote attackers to cause a denial of service (infinite loop or buffer overflow and crash) via a large Unicode character range in a regular expression.

Mitigation

Install update from vendor's website.

Vulnerable software versions

PostgreSQL: 9.1.0 - 9.5.0

External links

http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177820.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177878.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00049.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00052.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00054.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00056.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00016.html
http://rhn.redhat.com/errata/RHSA-2016-1060.html
http://www.debian.org/security/2016/dsa-3475
http://www.debian.org/security/2016/dsa-3476
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
http://www.postgresql.org/about/news/1644/
http://www.postgresql.org/docs/current/static/release-9-1-20.html
http://www.postgresql.org/docs/current/static/release-9-2-15.html
http://www.postgresql.org/docs/current/static/release-9-3-11.html
http://www.postgresql.org/docs/current/static/release-9-4-6.html
http://www.postgresql.org/docs/current/static/release-9-5-1.html
http://www.securityfocus.com/bid/83184
http://www.securitytracker.com/id/1035005
http://www.ubuntu.com/usn/USN-2894-1
http://kc.mcafee.com/corporate/index?page=content&id=SB10152
http://puppet.com/security/cve/CVE-2016-0773
http://security.gentoo.org/glsa/201701-33

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.