Auth bypass in Golang Go
CVE-2021-33197
In Go before 1.15.13 and 1.16.x before 1.16.5, some configurations of ReverseProxy (from net/http/httputil) result in a situation where an attacker is able to drop arbitrary headers.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.023 (82.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd 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
Weakness classification (CWE)
Public proof-of-concept exploits
References
- groups.google.com/g/golang-announce (Third Party Advisory)
- groups.google.com/g/golang-announce/c/RgCMkAEQjSI (Exploit, Patch, Third Party Advisory)
- security.gentoo.org/glsa/202208-02 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-33197?
- CVE-2021-33197 is a medium-severity vulnerability in Golang Go, classified under Missing Authorization. CVSS score: 5.3/10. Published 2021-08-02.
- How severe is CVE-2021-33197?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2021-33197 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.