Phosphor Net Ipmid
Monthly
An authentication bypass in OpenBMC's phosphor-net-ipmid IPMI stack lets a network attacker with no credentials complete IPMI 2.0 RAKP session authentication and obtain full BMC control. A crafted RAKP Message 1 forces the handler to return before the authentication object's constructor defaults are overwritten, so the service accepts a RAKP Message 3 whose HMAC is keyed with the hard-coded 20-byte 'userKey' derived from the string '0penBmc' combined with an often-predictable 'bmcRandomNum'. The flaw affects downstream vendors that ship phosphor-net-ipmid as their IPMI implementation, including NVIDIA and H3C, and runZero published a public advisory; no CISA KEV entry or EPSS score was supplied, and no patched version was identified in the provided data.
Privilege escalation in OpenBMC's phosphor-net-ipmid IPMI stack allows an attacker who already holds a valid low-privileged IPMI session to redirect that session's authorization context to a different, higher-privileged account while the original integrity and encryption keys stay in place, so no re-authentication ever occurs. Downstream vendors that package phosphor-net-ipmid — NVIDIA and H3C among them — inherit the flaw in their BMC firmware. Rated CVSS 8.8 with high confidentiality, integrity and availability impact; no public exploit code identified at time of analysis, and the issue is not listed in CISA KEV.
An authentication bypass in OpenBMC's phosphor-net-ipmid IPMI stack lets a network attacker with no credentials complete IPMI 2.0 RAKP session authentication and obtain full BMC control. A crafted RAKP Message 1 forces the handler to return before the authentication object's constructor defaults are overwritten, so the service accepts a RAKP Message 3 whose HMAC is keyed with the hard-coded 20-byte 'userKey' derived from the string '0penBmc' combined with an often-predictable 'bmcRandomNum'. The flaw affects downstream vendors that ship phosphor-net-ipmid as their IPMI implementation, including NVIDIA and H3C, and runZero published a public advisory; no CISA KEV entry or EPSS score was supplied, and no patched version was identified in the provided data.
Privilege escalation in OpenBMC's phosphor-net-ipmid IPMI stack allows an attacker who already holds a valid low-privileged IPMI session to redirect that session's authorization context to a different, higher-privileged account while the original integrity and encryption keys stay in place, so no re-authentication ever occurs. Downstream vendors that package phosphor-net-ipmid — NVIDIA and H3C among them — inherit the flaw in their BMC firmware. Rated CVSS 8.8 with high confidentiality, integrity and availability impact; no public exploit code identified at time of analysis, and the issue is not listed in CISA KEV.