by Kastro
Paper/Archive/CVE-2021-4464

CVE-2021-4464

FiberHome AN5506-04-FA — FIberHome AN5506-04-FA / HG6245D Routers Remote Stack Overflow

EPSS 2%CVSS 9.3
critical.is priorityof 100
44
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 82.3.823 × 2016.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

FiberHome AN5506-04-FA firmware versions up to and including RP2631 and HG6245D prior to RP2602 contain a stack-based buffer overflow, as the HTTP service ('webs') fails to enforce maximum lengths for Cookie header values. When a cookie longer than 511 bytes is processed, a stack buffer is overrun, leading to a crash or potential control of execution flow.

Affected

ProductAffectedFixed inSource
AN5506-04-FA≤ RP2631–CNA
HG6245D< RP2602RP2602CNA

Scores by source

VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

exploitpierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#misc-remote-stack-overflow-an5506exploitpierrekim.github.io/advisories/2021-fiberhome-0x00-ont.txtwriteupvulncheck.com/advisories/fiberhome-routers-remote-stack-overflow