Bug 1277865 - (CVE-2015-5316) CVE-2015-5316 wpa_supplicant: EAP-pwd peer error path failure on unexpected Confirm message
CVE-2015-5316 wpa_supplicant: EAP-pwd peer error path failure on unexpected C...
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20151110,reported=2...
: Security
Depends On:
Blocks: 1277868
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Reported: 2015-11-04 04:33 EST by Martin Prpič
Modified: 2015-11-11 06:50 EST (History)
1 user (show)

See Also:
Fixed In Version: wpa_supplicant 2.6
Doc Type: Bug Fix
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Last Closed: 2015-11-04 04:37:11 EST
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
CVE-2015-5316 patch (1.05 KB, text/plain)
2015-11-04 04:34 EST, Martin Prpič
no flags Details

  None (edit)
Description Martin Prpič 2015-11-04 04:33:47 EST
The following flaw was reported in wpa_supplicant:

A vulnerability was found in EAP-pwd peer implementation used in wpa_supplicant. If an EAP-pwd Confirm message is received unexpectedly before the Identity exchange, the error path processing ended up dereferencing a NULL pointer and terminating the process.

For wpa_supplicant with EAP-pwd enabled in a network configuration profile, this could allow a denial of service attack by an attacker within radio range.

Vulnerable versions/configurations:

wpa_supplicant v1.0-v2.5 with CONFIG_EAP_PWD=y in the build configuration (wpa_supplicant/.config) and EAP-pwd enabled in a network profile at runtime.

Possible mitigation steps

- Disable EAP-pwd in runtime configuration

External References:

http://w1.fi/security/2015-8/
Comment 1 Martin Prpič 2015-11-04 04:34 EST
Created attachment 1089509 [details]
CVE-2015-5316 patch
Comment 2 Martin Prpič 2015-11-04 04:37:11 EST
Affected code does not exist in wpa_supplicant versions in Red Hat Enterprise Linux 6 and earlier. The wpa_supplicant packages in Red Hat Enterprise Linux 7 and Fedora are not built with the CONFIG_EAP_PWD configuration option and hence are also unaffected.

Statement:

Not vulnerable. This issue did not affect the versions of wpa_supplicant as shipped with Red Hat Enterprise Linux 5, 6, and 7.

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