National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-11555 Detail

Current 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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 5.9 MEDIUM
Vector: AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H (V3.0 legend)
Impact Score: 3.6
Exploitability Score: 2.2


Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 4.3 MEDIUM
Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:P) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 8.6


Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Partial
Additional Information:
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.openwall.com/lists/oss-security/2019/04/26/1 Mailing List Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/07/msg00030.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5T7G763UECWR7FQXOJVL67PW7C5A3SA4/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DJKZHAT5KPUN26JL77EUH563GAH5XZ5C/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IQ6P2GI5GSXRNLNIUNPARFZQVDEIGVZD/
https://seclists.org/bugtraq/2019/May/40
https://seclists.org/bugtraq/2019/May/64
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:03.wpa.asc
https://security.gentoo.org/glsa/201908-25
https://usn.ubuntu.com/3969-1/
https://usn.ubuntu.com/3969-2/
https://w1.fi/security/2019-5/ Patch Vendor Advisory
https://w1.fi/security/2019-5/eap-pwd-message-reassembly-issue-with-unexpected-fragment.txt Vendor Advisory
https://www.debian.org/security/2019/dsa-4450
https://www.openwall.com/lists/oss-security/2019/04/18/6 Mailing List Patch Third Party Advisory

Technical Details

Vulnerability Type (View All)

  • NULL Pointer Dereference (CWE-476)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:w1.fi:hostapd:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
2.8
 cpe:2.3:a:w1.fi:wpa_supplicant:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
2.8


Change History

13 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-11555
NVD Published Date:
04/26/2019
NVD Last Modified:
06/06/2019