CVE-2021-3116

before_upstream_connection in AuthPlugin in http/proxy/auth.py in proxy.py before 2.3.1 accepts incorrect Proxy-Authorization header data because of a boolean confusion (and versus or).

CVSS v4.0 GitHub

8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS v3.1 NVD

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v2.0 NVD

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N

EPSS

1.69% chance of exploitation in the next 30 days, 77th percentile

Published

2021-01-11

Updated

2024-08-03

Proof-of-concept exploits (1)

• https://cardaci.xyz/advisories/2021/01/10/proxy.py-2.3.0-broken-basic-authentication/

Security advisories

• https://cardaci.xyz/advisories/2021/01/10/proxy.py-2.3.0-broken-basic-authentication
• advisories/GHSA-cmc7-mfmr-xqrx
• abhinavsingh/proxy.py/pull/482/commits/9b00093288237f5073c403f2c4f62acfdfa8ed46
• https://pypi.org/project/proxy.py/2.3.1/#history

References

• CVE Record
• NVD entry