Debian update for lighttpd
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2022-37797 CVE-2022-41556 |
| CWE-ID | CWE-476 CWE-401 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Debian Linux Operating systems & Components / Operating system lighttpd (Debian package) Operating systems & Components / Operating system package or component |
| Vendor | Debian |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) NULL pointer dereference
EUVDB-ID: #VU67731
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-37797
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error within the mod_wstunnel module when handling invalid HTTP requests. A remote attacker can send specially crafted HTTP requests to the affected web server and perform a denial of service (DoS) attack.
MitigationUpdate lighttpd package to version 1.4.59-1+deb11u2.
Vulnerable software versionsDebian Linux: All versions
lighttpd (Debian package): before 1.4.59-1+deb11u2
External linkshttp://www.debian.org/security/2022/dsa-5243
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Memory leak
EUVDB-ID: #VU67733
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-41556
CWE-ID:
CWE-401 - Missing release of memory after effective lifetime
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak within the mod_fastcgi and mod_scgi modules when handling a large number of incorrect HTTP requests. A remote attacker can send multiple incorrect HTTP requests to the web server and perform denial of service attack.
MitigationUpdate lighttpd package to version 1.4.59-1+deb11u2.
Vulnerable software versionsDebian Linux: All versions
lighttpd (Debian package): before 1.4.59-1+deb11u2
External linkshttp://www.debian.org/security/2022/dsa-5243
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
