High severity · published Sep 12, 2022
CVE-2022-37797
In lighttpd 1.4.65, mod_wstunnel does not initialize a handler function pointer if an invalid HTTP request (websocket handshake) is received
7.5
CVSS
2.5%
EPSS
No
On KEV
Description
In lighttpd 1.4.65, mod_wstunnel does not initialize a handler function pointer if an invalid HTTP request (websocket handshake) is received. It leads to null pointer dereference which crashes the server. It could be used by an external attacker to cause denial of service condition.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.5% · higher than 85% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
10.0 · source: NVD
LI
Lighttpd · Lighttpd
1.4.65 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-37797
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-37797
Mailing List
https://lists.debian.org/debian-lts-announce/2022/10/msg00002.html
Exploit
https://redmine.lighttpd.net/issues/3165
Third Party Advisory
https://security.gentoo.org/glsa/202210-12
Mailing List
https://www.debian.org/security/2022/dsa-5243
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