CVE-2022-30114
Published: 19 May 2023
Summary
CVE-2022-30114 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Fastweb Fastgate Vdsl2 Dga4131Fwb Firmware. Its CVSS base score is 7.5 (High).
Operationally, ranked in the top 4.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2022-30114 is a heap-based buffer overflow vulnerability, tracked under CWE-787, that affects a network service in Fastweb FASTGate MediaAccess routers. Impacted devices include the FGA2130FWB running firmware version 18.3.n.0482_FW_230_FGA2130 and the DGA4131FWB running firmware up to version 18.3.n.0462_FW_261_DGA4131. The flaw carries a CVSS 3.1 score of 7.5 and permits remote denial-of-service conditions when triggered over the network.
An unauthenticated attacker can exploit the issue by sending a specially crafted HTTP request to the affected network service. Successful exploitation causes a heap overflow that forces the device to reboot, resulting in loss of availability without any impact on confidentiality or integrity.
Public references consist of a technical disclosure write-up and Fastweb’s customer assistance pages for the FASTGate product line; neither source details an available firmware patch or specific configuration mitigations. The associated EPSS score has remained flat at 0.1656 with no observed rise after publication.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-35327
Vulnerability details
A heap-based buffer overflow in a network service in Fastweb FASTGate MediaAccess FGA2130FWB, firmware version 18.3.n.0482_FW_230_FGA2130, and DGA4131FWB, firmware version up to 18.3.n.0462_FW_261_DGA4131, allows a remote attacker to reboot the device through a crafted HTTP request, causing DoS.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.