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No exploitation reportedFix available

CVE-2022-37797

No exploitation reported by the sources we read.

  • Published2022-09-12
  • WeaknessCWE-476

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2022-09-1215:15CVE publishedNVD

Versions per branch

NVD
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
lighttpd
BranchAffectedFixed in
1.4= 1.4.65no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • lighttpdUbuntu:22.04:LTSall versions · no fixed version listed
  • lighttpdUbuntu:20.04:LTSall versions · no fixed version listed
  • lighttpdSUSE:Package Hub 15 SP4all versions · fixed in 1.4.66-bp154.2.3.1
  • lighttpdSUSE:Package Hub 15 SP3all versions · fixed in 1.4.66-bp154.2.3.1
  • lighttpdopenSUSE:Tumbleweedall versions · fixed in 1.4.66-1.1
  • lighttpdopenSUSE:Leap 15.4all versions · fixed in 1.4.66-bp154.2.3.1
  • lighttpdopenSUSE:Leap 15.3all versions · fixed in 1.4.66-bp154.2.3.1
  • lighttpdopenEuler:22.03-LTSall versions · fixed in 1.4.67-1.oe2203

8 more package ranges on OSV.dev

Vendor advisories

  • CVE-2022-37797 Red Hat Product Security

    www-servers/lighttpd: DoS via uninitialized function pointer

  • ICSA-24-046-11 CISA11 known affected

    Siemens SCALANCE XCM-/XRM-300

    SCALANCE XCH328 (6GK5328-4TS01-2EC2) · SCALANCE XCM324 (6GK5324-8TS01-2AC2) · SCALANCE XCM328 (6GK5328-4TS01-2AC2) · +8 more

  • SSA-806742 Siemens ProductCERT11 known affected

    SSA-806742: Multiple Vulnerabilities in SCALANCE XCM-/XRM-300 before V2.4

    SCALANCE XCH328 (6GK5328-4TS01-2EC2) · SCALANCE XCM324 (6GK5324-8TS01-2AC2) · SCALANCE XCM328 (6GK5328-4TS01-2AC2) · +8 more

Full record on NVD

Fix

  1. Vendor fix Siemens ProductCERT SSA-806742 · 10 productsUpdate to V2.4 or later version
  2. Vendor fix CISA ICSA-24-046-11 · 10 productsUpdate to V2.4 or later version

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2022-09-12
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-cm5p-p299-9f4g

Frequently asked questions

What is 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. It leads to null pointer dereference which crashes the server. It could be used by an external attacker to cause denial of service condition.

Is CVE-2022-37797 actively exploited?

Active exploitation of CVE-2022-37797 has not been confirmed. Its EPSS score was 2.6% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-37797?

CVE-2022-37797 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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