VulnerabilityModified
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).
HIGH 7.5EPSS 1.67%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.67%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 1.67% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-697
- Affected
- proxy.py project/proxy.py
- Source
- cve@mitre.org
References
- https://cardaci.xyz/advisories/2021/01/10/proxy.py-2.3.0-broken-basic-authentication/Exploit, Third Party Advisory
- https://github.com/abhinavsingh/proxy.py/pull/482/commits/9b00093288237f5073c403f2c4f62acfdfa8ed46Patch
- https://pypi.org/project/proxy.py/2.3.1/#historyProduct
- https://cardaci.xyz/advisories/2021/01/10/proxy.py-2.3.0-broken-basic-authentication/Exploit, Third Party Advisory
- https://github.com/abhinavsingh/proxy.py/pull/482/commits/9b00093288237f5073c403f2c4f62acfdfa8ed46Patch
- https://pypi.org/project/proxy.py/2.3.1/#historyProduct
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.