What is CVE-2018-18439?

CVE-2018-18439 is a critical-severity vulnerability in Denx U-boot, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2018-11-20.

How severe is CVE-2018-18439?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2018-18439 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Denx U-boot

CVE-2018-18439

DENX U-Boot through 2018.09-rc1 has a remotely exploitable buffer overflow via a malicious TFTP server because TFTP traffic is mishandled. Also, local exploitation can occur via a crafted kernel image.

Vulnerability class: Buffer Overflow

EPSS: 0.020 (79.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Denx U-boot — versions 2018.09
N/a — versions n/a

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

f-secure-foundry/advisories

References

cve@mitre.org (mailing-list, x_refsource_MLIST, Exploit, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2018-18439?: CVE-2018-18439 is a critical-severity vulnerability in Denx U-boot, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2018-11-20.
How severe is CVE-2018-18439?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2018-18439 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.