Multiple vulnerabilities in cPanel EasyApache



| Updated: 2017-09-07
Risk High
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2017-0900
CVE-2017-0899
CVE-2017-0901
CVE-2017-0902
CVE-2017-12932
CWE-ID CWE-20
CWE-284
CWE-416
Exploitation vector Network
Public exploit Public exploit code for vulnerability #3 is available.
Vulnerable software
 EasyApache
Server applications / Other server solutions

Vendor cPanel, Inc

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Denial of service

EUVDB-ID: #VU8055

Risk: Low

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

CVE-ID: CVE-2017-0900

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local attacker to cause DoS condition on the target system.

The weakness exists due to insufficient validation of user-supplied input. A local attacker can supply a specially crafted 'query' command and cause the service to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Install update from vendor's website.

Vulnerable software versions

EasyApache: 4

CPE2.3 External links

https://news.cpanel.com/easyapache-sept-6-2017-maintenance-release/


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.

2) Security restrictions bypass

EUVDB-ID: #VU8056

Risk: Low

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

CVE-ID: CVE-2017-0899

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The weakness exists due to unknown error. A remote attacker can escape ANSI.

Mitigation

Install update from vendor's website.

Vulnerable software versions

EasyApache: 4

CPE2.3 External links

https://news.cpanel.com/easyapache-sept-6-2017-maintenance-release/


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) Improper input validation

EUVDB-ID: #VU8057

Risk: Medium

CVSSv4.0: 7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2017-0901

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to overwrite arbitrary files on the target system.

The weakness exists due to insufficient validation of user-supplied input. A remote attacker can trick the victim into installing a specially crafted RubyGem and overwrite arbitrary files.

Mitigation

Install update from vendor's website.

Vulnerable software versions

EasyApache: 4

CPE2.3 External links

https://news.cpanel.com/easyapache-sept-6-2017-maintenance-release/


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. However, proof of concept for this vulnerability is available.

4) Session hijacking

EUVDB-ID: #VU8058

Risk: Low

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

CVE-ID: CVE-2017-0902

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to hijack the target user's session.

The weakness exists due to improper access control. A remote attacker can hijack DNS sessions.

Mitigation

Install update from vendor's website.

Vulnerable software versions

EasyApache: 4

CPE2.3 External links

https://news.cpanel.com/easyapache-sept-6-2017-maintenance-release/


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.

5) Heap use-after-free error

EUVDB-ID: #VU8137

Risk: Medium

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:Green]

CVE-ID: CVE-2017-12932

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to improper use of the hash API for key deletion in a situation with an invalid array size. A remote attacker can use untrusted data to trigger heap use-after-free error in ext/standard/var_unserializer.re and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Install update from vendor's website.

Vulnerable software versions

EasyApache: 4

CPE2.3 External links

https://news.cpanel.com/easyapache-sept-6-2017-maintenance-release/


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.



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