Vulnerability · Published Jan 11, 2021 · Assigned by mitre

CVE-2021-3116

High 7.5

In plain English

A high-severity security flaw in the proxy-py package (PyPI). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 77% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.5High

Exploit odds (30 days)1.7%top 22.8% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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).

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	proxy-py	2.3.1	GHSA-cmc7-mfmr-xqrx
PyPI	proxy-py	2.3.1	PYSEC-2021-46

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

https://cardaci.xyz/advisories/2021/01/10/proxy.py-2.3.0-broken-basic-authentication/ x_refsource_MISC
https://github.com/abhinavsingh/proxy.py/pull/482/commits/9b00093288237f5073c403f2c4f62acfdfa8ed46 x_refsource_MISC
https://pypi.org/project/proxy.py/2.3.1/#history x_refsource_MISC