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medium advisory

Python environment risk regarding eMudhra CA certificate trust

An identified configuration issue involving trust for eMudhra/emSign CA certificates in Python environments may expose developers to potential supply chain attacks via unauthorized package repositories.

Triage facts

Revision 1
Evidence
Unknown
Severity
Medium
Action
Elevated
Sources
1 public source
Freshness
Revision 1Oct 28, 16:16 UTC
Detection
2 IOCs
Source quality
B2Roughly even chance

Reports indicate that certain Python client environments may improperly trust eMudhra/emSign CA certificates. This trust could allow attackers to perform machine-in-the-middle (MitM) attacks or host malicious Python package repositories that bypass standard certificate validation. Users are encouraged to test their pip client trust configuration by attempting connections to provided test index URLs. If a client fails to return an SSL/TLS certificate error during these connection attempts, the environment is susceptible to potential supply chain compromise.

Recommendation

  • Verify Python environment trust settings by executing 'pip download' commands against the identified test domains to ensure the system correctly rejects unauthorized certificates.
  • Audit CA certificate stores on developer workstations and CI/CD runners to identify and remove untrusted or unexpected eMudhra/emSign certificates.
  • Restrict package installation sources to verified, internal, or trusted mirrors using established pip configuration files (pip.conf).

Immediate actions

Check network egress logs for successful connections to the identified test domains.

SOC 24h

Threat Hunt

Identify systems attempting to connect to the test domains which may indicate misconfigured environments.

T1195.002 medium medium confidence hunt now

Data: DNS query logs, Network proxy logs

Mitigations

Audit and remediate certificate trust stores on build agents and developer workstations to remove unauthorized or legacy CA certificates.

immediate IT Operations

CA Certificate trust configuration

Indicators of compromise

2

domain

TypeValue
domaindv-g3b-emudhra.we-have-a-problem.com
domaindv-g3b-aaa-emudhra.we-have-a-problem.com