Buffer overflow in hostapd

1) Buffer overflow

EUVDB-ID: #VU32295

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-4142

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

Integer underflow in the WMM Action frame parser in hostapd 0.5.5 through 2.4 and wpa_supplicant 0.7.0 through 2.4, when used for AP mode MLME/SME functionality, allows remote attackers to cause a denial of service (crash) via a crafted frame, which triggers an out-of-bounds read.

Mitigation

Install update from vendor's website.

Vulnerable software versions

hostapd: 0.5.5 - 2.4

External links

http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171401.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172608.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172655.html
http://lists.opensuse.org/opensuse-updates/2015-06/msg00019.html
http://rhn.redhat.com/errata/RHSA-2015-1090.html
http://rhn.redhat.com/errata/RHSA-2015-1439.html
http://w1.fi/security/2015-3/integer-underflow-in-ap-mode-wmm-action-frame.txt
http://www.debian.org/security/2015/dsa-3397
http://www.openwall.com/lists/oss-security/2015/05/09/5
http://www.openwall.com/lists/oss-security/2015/05/31/6
http://www.securitytracker.com/id/1032625
http://www.ubuntu.com/usn/USN-2650-1
http://security.gentoo.org/glsa/201606-17

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.