Integer overflow in lighttpd
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2019-11072 |
| CWE-ID | CWE-190 |
| 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) Integer overflow
EUVDB-ID: #VU18331
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-2019-11072
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform denial of service attack.
The vulnerability exists due to signed integer overflow when processing "/%2F?" characters in burl_normalize_2F_to_slash_fix() function in burl.c, when url-path-2f-decode option is enabled. A remote attacker can send a specially crafted HTTP GET request to the affected server, trigger integer overflow and crash the service.
MitigationInstall updates from vendor's repository.
Vulnerable software versionslighttpd: 1.4.1 - 1.4.53
External linkshttp://www.securityfocus.com/bid/107907
http://github.com/lighttpd/lighttpd1.4/commit/32120d5b8b3203fc21ccb9eafb0eaf824bb59354
http://redmine.lighttpd.net/issues/2945
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.
