CVE-2017-13087

Wi-Fi Protected Access (WPA and WPA2) that support 802.11v allows reinstallation of the Group Temporal Key (GTK) when processing a Wireless Network Management (WNM) Sleep Mode Response frame, allowing an attacker within radio range to replay frames from access points to clients.

Weakness

The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.

Affected Software

Potential Mitigations

• Use a well-vetted algorithm that is currently considered to be strong by experts in the field, and select well-tested implementations with adequate length seeds.
• In general, if a pseudo-random number generator is not advertised as being cryptographically secure, then it is probably a statistical PRNG and should not be used in security-sensitive contexts.
• Pseudo-random number generators can produce predictable numbers if the generator is known and the seed can be guessed. A 256-bit seed is a good starting point for producing a “random enough” number.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/112.html
• https://cwe.mitre.org/data/definitions/485.html
• https://cwe.mitre.org/data/definitions/59.html

References

• http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00020.html
• http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00023.html
• http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00024.html
• http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2017-007.txt
• http://www.debian.org/security/2017/dsa-3999
• http://www.kb.cert.org/vuls/id/228519
• http://www.securityfocus.com/bid/101274
• http://www.securitytracker.com/id/1039573
• http://www.securitytracker.com/id/1039576
• http://www.securitytracker.com/id/1039577
• http://www.securitytracker.com/id/1039578
• http://www.securitytracker.com/id/1039581
• http://www.ubuntu.com/usn/USN-3455-1
• https://access.redhat.com/errata/RHSA-2017:2907
• https://access.redhat.com/errata/RHSA-2017:2911
• https://access.redhat.com/security/vulnerabilities/kracks
• https://cert-portal.siemens.com/productcert/pdf/ssa-901333.pdf
• https://cert.vde.com/en-us/advisories/vde-2017-005
• https://security.FreeBSD.org/advisories/FreeBSD-SA-17:07.wpa.asc
• https://security.gentoo.org/glsa/201711-03
• https://source.android.com/security/bulletin/2017-11-01
• https://support.lenovo.com/us/en/product_security/LEN-17420
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171016-wpa
• https://w1.fi/security/2017-1/wpa-packet-number-reuse-with-replayed-messages.txt
• https://www.krackattacks.com/