SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2018-1992

The bootloader firmware contains a buffer overflow vulnerability such that, if an attacker were able to replace the initial boot firmware image with a very carefully crafted and sufficiently large, malicious replacement, it could cause the bootloader,…

MEDIUM 6.4EPSS 0.35%

Does this matter?

Lower severity and a low EPSS score (0.35%). Track it; it rarely justifies an emergency change on its own.

Description

The IBM Power 9 OP910, OP920, and FW910 boot firmware's bootloader is responsible for loading and validating the initial boot firmware image that drives the rest of the system's hardware initialization. The bootloader firmware contains a buffer overflow vulnerability such that, if an attacker were able to replace the initial boot firmware image with a very carefully crafted and sufficiently large, malicious replacement, it could cause the bootloader, during the load of that image, to overwrite its own instruction memory and circumvent secure boot protections, install trojans, etc. IBM X-Force ID: 154345.

CVSS 3.0
6.4 MEDIUMCVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS
0.35% probability · 29th percentile
CISA KEV
Not listed
Weakness
CWE-119
Affected
ibm/power system s922 \(9009-22a\) firmware · ibm/power system h922 \(9223-22h\) firmware · ibm/power system s914 \(9009-41a\) firmware · ibm/power system s924 \(9009-42a\) firmware · ibm/power system h924 \(9223-42h\) firmware · ibm/power system l922 \(9008-22l\) firmware · ibm/power system ac922 \(8335-gtg\) firmware · ibm/power system ac922 \(8335-gth\) firmware · ibm/power system ac922 \(8335-gtx\) firmware · ibm/power system lc921 \(9006-12p\) firmware · ibm/power system lc922 \(9006-22p\) firmware
Source
psirt@us.ibm.com

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.