CVE-2017-6094

CRITICO 9.8CVE-2017-6094 · Published 20/12/2017 · updated 17/06/2026

In breve

CVE-2017-6094 è una vulnerabilità CRITICO (CVSS 9.8) che riguarda gaps (genexis).
Probabilità di sfruttamento nei prossimi 30 giorni (EPSS): 1.2%, superiore al 68.0% delle vulnerabilità.
Correzione: aggiornare a 7.2 o successiva.

Package	Affected versions	Patched versions
gaps genexis	`< 7.2`	`7.2`

Description

CPEs used by subscribers on the access network receive their individual configuration settings from a central GAPS instance. A CPE identifies itself by the MAC address of its WAN interface and a certain "chk" value (48bit) derived from the MAC. The algorithm used to compute the "chk" was disclosed by reverse engineering the CPE's firmware. As a result, it is possible to forge valid "chk" values for any given MAC address and therefore receive the configuration settings of other subscribers' CPEs. The configuration settings often contain sensitive values, for example credentials (username/password) for VoIP services. This issue affects Genexis B.V. GAPS up to 7.2.

References

seclists.org/fulldisclosure/2017/Dec/62 · Exploit

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