This security bulletin contains one medium risk vulnerability.
CWE-400 - Resource exhaustion
Exploit availability: YesDescription
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources within the connection_read_header_more() function in connections.c. A remote attacker can trigger resource exhaustion by sending multiple requests with large HTTP headers and perform a denial of service (DoS) attack.Mitigation
Install updates from vendor's website.Vulnerable software versions
lighttpd: 1.4.56 - 1.4.58External links
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
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.