Information disclosure in lighttpd

1) Use-after-free

EUVDB-ID: #VU94060

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-25103

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to a use-after-free error when handling HTTP requests. A remote attacker can send a specially crafted HTTP request to the server, trigger a use-after-free error and gain access to potentially sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

lighttpd: 1.0.2 - 1.4.50

CPE2.3

• cpe:2.3:a:lighttpd:lighttpd:1.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:lighttpd:lighttpd:1.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:lighttpd:lighttpd:1.1.0:*:*:*:*:*:*:*

External links

https://www.runzero.com/blog/lighttpd/
https://github.com/lighttpd/lighttpd1.4/commit/df8e4f95614e476276a55e34da2aa8b00b1148e9
https://blogvdoo.wordpress.com/2018/11/06/giving-back-securing-open-source-iot-projects/#more-736
https://github.com/lighttpd/lighttpd1.4/commit/d161f53de04bc826ce1bdaeb3dce2c72ca50a3f8
https://9443417.fs1.hubspotusercontent-na1.net/hubfs/9443417/Security%20Advisories/2024/AMI-SA-2024002.pdf
https://www.kb.cert.org/vuls/id/312260

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.