Multiple vulnerabilities in lighttpd



Published: 2016-08-01 | Updated: 2016-08-20
Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2016-5387
CWE-ID CWE-79
CWE-61
CWE-284
Exploitation vector Network
Public exploit Public exploit code for vulnerability #3 is available.
Vulnerable software
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lighttpd
Server applications / Web servers

Vendor lighttpd

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Cross-site scripting

EUVDB-ID: #VU339

Risk: Low

CVSSv3.1:

CVE-ID: N/A

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The vulnerability can be used by a remote attacker to perform cross-site scripting attacks.

The vulnerability is caused by incorrect filtration of input data when displaying HTML and XML output. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in victim’s browser in security context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install the latest version 1.4.41.

Vulnerable software versions

lighttpd: 1.4.9 - 1.4.40


CPE2.3 External links

http://www.lighttpd.net/download/

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?

2) Privilege escalation

EUVDB-ID: #VU338

Risk: Low

CVSSv3.1:

CVE-ID: N/A

CWE-ID: CWE-61 - UNIX Symbolic Link (Symlink) Following

Exploit availability: No

Description

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

The vulnerability exists due to incorrect symlink handling in stat_cache, when “server.follow-symlink” is set to “disable”. A local attacker can overwrite arbitrary files on the target system with privileges of the web server.

Successful exploitation of this vulnerability may allow a local user to obtain elevated privileges.

Mitigation

Update to version 1.4.41.

Vulnerable software versions

lighttpd: 1.4.9 - 1.4.40


CPE2.3 External links

http://www.lighttpd.net/download/

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?

3) Httpoxy issue

EUVDB-ID: #VU337

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2016-5387

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information and compromise vulnerable server.

The vulnerability exists due to a design error in multiple implementations of web servers. A remote unauthenticated attacker can use a specially crafted Proxy header in HTTP request to influence HTTP_PROXY environment variable and redirect application’s HTTP traffic to arbitrary proxy server.

Successful exploitation of this vulnerability may allow an attacker to gain unauthorized access to sensitive information and compromise vulnerable server.

This vulnerability is known as httppoxy.

Mitigation

Install the latest version 1.4.41.

Vulnerable software versions
CPE2.3
External links

http://httpoxy.org/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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