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Ubuntu LinuxOperating system · Canonical

CVE-2017-13087

MEDIUM · 5.3 CVSS v3.0 Published 2017-10-17
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
58/100
Remediation priority · Elevated
No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

WPA/WPA2 implementations supporting 802.11v contain a vulnerability in the handling of WNM Sleep Mode Response frames that allows reinstallation of the Group Temporal Key (GTK). An attacker within radio range can replay frames from access points to clients, potentially enabling packet injection or session hijacking.

MitigationApply vendor patches to affected WPA/WPA2 implementations. If patches are unavailable, consider disabling 802.11v WNM features or upgrading to WPA3 where feasible.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Ubuntu LinuxOperating system
Affected:= 14.04= 16.04= 17.04
Debian LinuxOperating system
Affected:= 8.0= 9.0
FreeBSDOperating system
Affected:all versions= 10= 10.4= 11= 11.1
Enterprise Linux DesktopOperating system
Affected:= 7
Enterprise Linux ServerOperating system
Affected:= 7
LeapOperating system
Affected:= 42.2= 42.3
HostapdApplication
Affected:= 0.2.4= 0.2.5= 0.2.6= 0.2.8= 0.3.7= 0.3.9= 0.3.10= 0.3.11= 0.4.7= 0.4.8= 0.4.9= 0.4.10
Wpa SupplicantApplication
Affected:= 0.2.4= 0.2.5= 0.2.6= 0.2.7= 0.2.8= 0.3.7= 0.3.8= 0.3.9= 0.3.10= 0.3.11= 0.4.7= 0.4.8

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Adjacent
Complexity
High
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify wpa_supplicant version
    Run 'wpa_supplicant -v' or check the package manager (dpkg -l wpasupplicant, rpm -qa wpasupplicant)
    Affected if Version matches any of: 0.2.4-0.2.8, 0.3.7-0.3.11, 0.4.7-0.4.10
  2. Identify hostapd version
    Run 'hostapd -v' or check the package manager (dpkg -l hostapd, rpm -qa hostapd)
    Affected if Version matches any of: 0.2.4-0.2.6, 0.2.8, 0.3.7, 0.3.9-0.3.11, 0.4.7-0.4.10
  3. Check if 802.11v WNM is enabled in wpa_supplicant config
    Inspect wpa_supplicant.conf for 'wnm_sleep_mode' or 'bss_transition' directives, or check for '80211v' in network block
    Affected if wnm_sleep_mode=1 or bss_transition=1 is present and the wpa_supplicant version is vulnerable
  4. Check if 802.11v WNM is enabled in hostapd config
    Inspect hostapd.conf for 'wnm_sleep_mode' or 'bss_transition' directives, or check for 'ieee80211v=1'
    Affected if ieee80211v=1 or wnm_sleep_mode=1 is present and the hostapd version is vulnerable
  5. Verify Linux distribution kernel/network stack version
    Check OS version with 'lsb_release -a' or 'cat /etc/os-release'; for FreeBSD use 'uname -a'
    Affected if System runs Ubuntu 14.04, 16.04, or 17.04; Debian 8.0 or 9.0; FreeBSD 10.x or 11.x; RHEL 7; or openSUSE Leap 42.2 or 42.3

The environment is affected if wpa_supplicant or hostapd with a vulnerable version is in use AND 802.11v WNM features (wnm_sleep_mode or bss_transition) are enabled.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply vendor patches to affected WPA/WPA2 implementations. If patches are unavailable, consider disabling 802.11v WNM features or upgrading to WPA3 where feasible.

Fix this in Ubuntu Linux Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
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Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2017-13087 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data