CVE-2019-11555

Description

The EAP-pwd implementation in hostapd (EAP server) before 2.8 and wpa_supplicant (EAP peer) before 2.8 does not validate fragmentation reassembly state properly for a case where an unexpected fragment could be received. This could result in process termination due to a NULL pointer dereference (denial of service). This affects eap_server/eap_server_pwd.c and eap_peer/eap_pwd.c.

Category

5.9
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 9.39% Top 10%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory FreeBSD.org Vendor Advisory debian.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory w1.fi Vendor Advisory w1.fi
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.openwall.com/lists/oss-security/2019/04/18/6 mailing list third party advisory patch
https://w1.fi/security/2019-5/eap-pwd-message-reassembly-issue-with-unexpected-fragment.txt vendor advisory
https://w1.fi/security/2019-5/ patch vendor advisory
http://www.openwall.com/lists/oss-security/2019/04/26/1 mailing list third party advisory patch
https://usn.ubuntu.com/3969-1/ vendor advisory
https://usn.ubuntu.com/3969-2/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5T7G763UECWR7FQXOJVL67PW7C5A3SA4/ vendor advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:03.wpa.asc vendor advisory
https://seclists.org/bugtraq/2019/May/40 mailing list
https://www.debian.org/security/2019/dsa-4450 vendor advisory
https://seclists.org/bugtraq/2019/May/64 mailing list
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IQ6P2GI5GSXRNLNIUNPARFZQVDEIGVZD/ vendor advisory
https://lists.debian.org/debian-lts-announce/2019/07/msg00030.html mailing list
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DJKZHAT5KPUN26JL77EUH563GAH5XZ5C/ vendor advisory
https://security.gentoo.org/glsa/201908-25 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-11555?
CVE-2019-11555 has been scored as a medium severity vulnerability.
How to fix CVE-2019-11555?
To fix CVE-2019-11555, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-11555 being actively exploited in the wild?
It is possible that CVE-2019-11555 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~9% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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