Bug 1500302 (CVE-2017-13086)
| Summary: | CVE-2017-13086 wpa_supplicant: reinstallation of the Tunneled Direct-Link Setup (TDLS) PeerKey (TPK) key in the TDLS handshake | ||
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| Product: | [Other] Security Response | Reporter: | Adam Mariš <amaris> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | Ken Benoit <kbenoit> |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | unspecified | CC: | bgalvani, blueowl, dcaratti, dcbw, linville, lkundrak, lrintel, negativo17, security-response-team, slawomir, sukulkar |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: |
A new exploitation technique called key reinstallation attacks (KRACK) affecting WPA2 has been discovered. A remote attacker within Wi-Fi range could exploit this attack to decrypt Wi-Fi traffic or possibly inject forged Wi-Fi packets by reinstalling a previously used Tunneled Direct-Link Setup (TDLS) Peerkey (TPK) key during a TDLS handshake.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2017-10-19 08:47:41 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1495527, 1495528, 1502588, 1502589 | ||
| Bug Blocks: | 1491701 | ||
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Description
Adam Mariš
2017-10-10 11:17:37 UTC
Acknowledgments: Name: CERT Upstream: Mathy Vanhoef (University of Leuven) Initital support for TDLS came with 1.0. RHEL6 does not provide support for TDLS and should not be affected. RHEL7 already has the patch to prevent TDLS TPK M2 retransmission: https://w1.fi/cgit/hostap/commit/?id=dabdef9e048b17b22b1c025ad592922eab30dda8 This only leaves TDLS TPK M3, where the attack is believed to be of rather theoretical nature, unless WEP is used. However, WEP is already broken and should not be used, so there's little to gain for an attacker. Created hostapd tracking bugs for this issue: Affects: fedora-all [bug 1502588] Created wpa_supplicant tracking bugs for this issue: Affects: fedora-all [bug 1502589] The upstream advisory suggests that this doesn't affect wpa_supplicant v. 2.6, that is shipped with Fedora 25 and newer (all supported Fedora versions) and RHEL 7.4, if I'm reading that correctly:
> For the TDLS TPK M2 retransmission issue (CVE-2017-13086) with older
> wpa_supplicant versions, consider updating to the latest version or
> merge in a commit that is present in v2.6:
> https://w1.fi/cgit/hostap/commit/?id=dabdef9e048b17b22b1c025ad592922eab30dda8
> ('TDLS: Ignore incoming TDLS Setup Response retries')
External References: https://access.redhat.com/security/vulnerabilities/kracks https://w1.fi/security/2017-1/wpa-packet-number-reuse-with-replayed-messages.txt https://www.krackattacks.com/ This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2017:2907 https://access.redhat.com/errata/RHSA-2017:2907 Statement: This issue did not affect the versions of wpa_supplicant as shipped with Red Hat Enterprise Linux 5 and 6, as it does not support TDLS. This issue affects the versions of wpa_supplicant as shipped with Red Hat Enterprise Linux 7. |