Fedora 28 update for httpd

Published: 2019-04-03 | Updated: 2025-04-24

Risk	Medium
Patch available	YES
Number of vulnerabilities	4
CVE-ID	CVE-2019-0211 CVE-2019-0215 CVE-2019-0217 CVE-2019-0220
CWE-ID	CWE-264 CWE-362 CWE-20
Exploitation vector	Network
Public exploit	Vulnerability #1 is being exploited in the wild.
Vulnerable software	Fedora Operating systems & Components / Operating system httpd Operating systems & Components / Operating system package or component
Vendor	Fedoraproject

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Privilege escalation

EUVDB-ID: #VU18110

Risk: Low

CVSSv4.0: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:A/U:Clear]

CVE-ID: CVE-2019-0211

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: Yes

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists within MPM implementation due to the application does not properly maintain each child's listener bucket number in the scoreboard that may lead to unprivileged code or scripts run by server (e.g. via mod_php) to modify the scoreboard and abuse the privileged main process.

A local user can execute arbitrary code on the system with privileges of the Apache HTTP Server code process.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 28

httpd: before 2.4.39-1.1.fc28

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2019-a4ed7400f4

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

2) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU18112

Risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-0215

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists within the mod_ssl module when processing access controls for per-location/per-dir client certificate verification in TLSv1.3. A remote authenticated attacker can gain access to restricted directories on the server.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 28

httpd: before 2.4.39-1.1.fc28

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2019-a4ed7400f4

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Race condition

EUVDB-ID: #VU18111

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-0217

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a remote authenticated user to impersonate other users.

The vulnerability exists due to a race condition within the mod_auth_digests module. A remote authenticated attacker can send a series of requests and impersonate other users under a threaded MPM.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 28

httpd: before 2.4.39-1.1.fc28

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2019-a4ed7400f4

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Input validation error

EUVDB-ID: #VU18113

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-0220

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to the web server does not merge consecutive slashes in URLs, that can lead to incorrect processing of requests when accessing CGI programs. Such web server behavior may lead to security restrictions bypass.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 28

httpd: before 2.4.39-1.1.fc28

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2019-a4ed7400f4

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.