VulnerabilityModified
CVE-2021-27177
It is possible to bypass authentication by sending the decoded value of the GgpoZWxwCmxpc3QKd2hvCg== string to the telnet server.
CRITICAL 9.8EPSS 19.7%
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 19.7%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
Description
An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to bypass authentication by sending the decoded value of the GgpoZWxwCmxpc3QKd2hvCg== string to the telnet server.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 19.73% probability · 97th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-863
- Affected
- fiberhome/hg6245d firmware
- Source
- cve@mitre.org
References
- https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#telnet-cli-auth-bypassExploit, Third Party Advisory
- https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#telnet-cli-auth-bypassExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.