Fedora 28 update for hostapd
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 6 |
| CVE-ID | CVE-2019-9494 CVE-2019-9495 CVE-2019-9496 CVE-2019-9497 CVE-2019-9498 CVE-2019-9499 |
| CWE-ID | CWE-200 CWE-327 CWE-287 CWE-264 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Fedora Operating systems & Components / Operating system hostapd Operating systems & Components / Operating system package or component |
| Vendor | Fedoraproject |
Security Bulletin
This security bulletin contains information about 6 vulnerabilities.
1) Information disclosure
EUVDB-ID: #VU23959
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2019-9494
CWE-ID:
CWE-200 - Exposure of sensitive information to an unauthorized actor
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to the implementations of SAE are vulnerable to side channel attacks as a result of observable timing differences and cache access patterns. A remote attacker can gain leaked information from a side channel attack that can be used for full password recovery.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsFedora: 28
hostapd: before 2.7-2.fc28
CPE2.3 External linkshttps://bodhi.fedoraproject.org/updates/FEDORA-2019-d03bae77f5
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Use of a broken or risky cryptographic algorithm
EUVDB-ID: #VU23960
Risk: Low
CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2019-9495
CWE-ID:
CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to sensitive information on the target system.
The vulnerability exists due to the implementations of EAP-PWD are vulnerable to side-channel attacks as a result of cache access patterns. A remote attacker with ability to install and execute applications can crack weak passwords when memory access patterns are visible in a shared cache.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsFedora: 28
hostapd: before 2.7-2.fc28
CPE2.3 External linkshttps://bodhi.fedoraproject.org/updates/FEDORA-2019-d03bae77f5
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Improper Authentication
EUVDB-ID: #VU23961
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2019-9496
CWE-ID:
CWE-287 - Improper Authentication
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to missing state validation steps when processing the
SAE confirm message when in hostapd/AP mode. A remote attacker can bypass authentication process, force the hostapd process to terminate and perform a denial of service (DoS) attack on the target system.
Install updates from vendor's repository.
Vulnerable software versionsFedora: 28
hostapd: before 2.7-2.fc28
CPE2.3 External linkshttps://bodhi.fedoraproject.org/updates/FEDORA-2019-d03bae77f5
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
4) Improper Authentication
EUVDB-ID: #VU23962
Risk: High
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2019-9497
CWE-ID:
CWE-287 - Improper Authentication
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to the implementations of EAP-PWD in hostapd EAP Server and wpa_supplicant EAP Peer do not validate the scalar and element values in EAP-pwd-Commit. A remote attacker can complete EAP-PWD authentication without knowing the password and gain unauthorized access to the application.
However, unless the crypto library does not implement additional checks for the EC point, the attacker will not be able to derive the session key or complete the key exchange.
This vulnerability affects the following products:
- hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.4
- hostapd with EAP-pwd support and wpa_supplicant with EAP-pwd support prior to and including version 2.7
Install updates from vendor's repository.
Vulnerable software versionsFedora: 28
hostapd: before 2.7-2.fc28
CPE2.3 External linkshttps://bodhi.fedoraproject.org/updates/FEDORA-2019-d03bae77f5
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
5) Permissions, Privileges, and Access Controls
EUVDB-ID: #VU23963
Risk: High
CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2019-9498
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to the implementations of EAP-PWD in hostapd EAP Server, when built against a crypto library missing explicit validation on imported elements, do not validate the scalar and element values in EAP-pwd-Commit. A remote attacker can use invalid scalar/element values to complete authentication.
This vulnerability affects the following products:
- hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.4
- hostapd with EAP-pwd support and wpa_supplicant with EAP-pwd support prior to and including version 2.7
Install updates from vendor's repository.
Vulnerable software versionsFedora: 28
hostapd: before 2.7-2.fc28
CPE2.3 External linkshttps://bodhi.fedoraproject.org/updates/FEDORA-2019-d03bae77f5
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
6) Permissions, Privileges, and Access Controls
EUVDB-ID: #VU23964
Risk: High
CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2019-9499
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to the implementations of EAP-PWD in wpa_supplicant EAP Peer, when built against a crypto library missing explicit validation on imported elements, do not validate the scalar and element values in EAP-pwd-Commit. A remote attacker can complete authentication, session key and control of the data connection with a client.
This vulnerability affects the following products:
- hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.4
- hostapd with EAP-pwd support and wpa_supplicant with EAP-pwd support prior to and including version 2.7
Install updates from vendor's repository.
Vulnerable software versionsFedora: 28
hostapd: before 2.7-2.fc28
CPE2.3 External linkshttps://bodhi.fedoraproject.org/updates/FEDORA-2019-d03bae77f5
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
