What is CVE-2020-14034?

CVE-2020-14034 is a critical-severity vulnerability in Meetecho Janus, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2020-06-15.

How severe is CVE-2020-14034?

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

Buffer overflow in Meetecho Janus

CVE-2020-14034

An issue was discovered in janus-gateway (aka Janus WebRTC Server) through 0.10.0. janus_get_codec_from_pt in utils.c has a Buffer Overflow via long value in an SDP Offer packet.

Vulnerability class: Buffer Overflow

Published 2020-06-15 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.023 (82.5th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Meetecho Janus

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

github.com/meetecho/janus-gateway/blob/v0.10.0/utils.c (Patch, Third Party Advisory)
github.com/meetecho/janus-gateway/blob/v0.10.0/utils.c (Patch, Third Party Advisory)
github.com/meetecho/janus-gateway/pull/2229 (Third Party Advisory)

Frequently asked questions

What is CVE-2020-14034?: CVE-2020-14034 is a critical-severity vulnerability in Meetecho Janus, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2020-06-15.
How severe is CVE-2020-14034?: Critical severity. CVSS v3 base score is 9.8 out of 10.