Buffer overflow in Fiberhome An5506-04-Fa
CVE-2021-4464
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.
Vulnerability class: Buffer Overflow
Published · last modified .
EPSS exploit prediction
EPSS: 0.020 (80.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- Fiberhome An5506-04-Fa — versions 0
- Fiberhome Hg6245d — versions 0
Weakness classification (CWE)
References
- pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html (technical-description, exploit)
- pierrekim.github.io/advisories/2021-fiberhome-0x00-ont.txt (technical-description, exploit)
- www.vulncheck.com/advisories/fiberhome-routers-remote-stack-overflow (third-party-advisory)