Denial of service in Lighttpd
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2022-30780 |
| CWE-ID | CWE-400 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
lighttpd Server applications / Web servers |
| Vendor | lighttpd |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Resource exhaustion
EUVDB-ID: #VU67732
Risk: Medium
CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2022-30780
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: Yes
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionslighttpd: 1.4.56 - 1.4.58
External linkshttp://redmine.lighttpd.net/issues/3059
http://podalirius.net/en/cves/2022-30780/
http://github.com/p0dalirius/CVE-2022-30780-lighttpd-denial-of-service
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.
