#VU32295 Buffer overflow in hostapd - CVE-2015-4142
Vulnerability identifier: #VU32295
Vulnerability risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID:
CWE-ID:
CWE-119
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
hostapd
Server applications /
Remote access servers, VPN
Vendor: Jouni Malinen
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
https://lists.fedoraproject.org/pipermail/package-announce/2015-November/171401.html
https://lists.fedoraproject.org/pipermail/package-announce/2015-November/172608.html
https://lists.fedoraproject.org/pipermail/package-announce/2015-November/172655.html
https://lists.opensuse.org/opensuse-updates/2015-06/msg00019.html
https://rhn.redhat.com/errata/RHSA-2015-1090.html
https://rhn.redhat.com/errata/RHSA-2015-1439.html
https://w1.fi/security/2015-3/integer-underflow-in-ap-mode-wmm-action-frame.txt
https://www.debian.org/security/2015/dsa-3397
https://www.openwall.com/lists/oss-security/2015/05/09/5
https://www.openwall.com/lists/oss-security/2015/05/31/6
https://www.securitytracker.com/id/1032625
https://www.ubuntu.com/usn/USN-2650-1
https://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.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
