Timing attacks in python-rsa
Published Nov 12, 2020 · Updated Oct 23, 2026 · Also known as PYSEC-2020-100, GHSA-xrx6-fmxq-rjj2
Original summary
Normalized public record · Updated Oct 23, 2026
Timing attacks in python-rsa
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
It was found that python-rsa is vulnerable to Bleichenbacher timing attacks. An attacker can use this flaw via the RSA decryption API to decrypt parts of the cipher text encrypted with RSA
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- 10%
- Aliases
- PYSEC-2020-100, GHSA-xrx6-fmxq-rjj2
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- bugzilla.redhat.com ↗
- Source repository ↗
- FEDORA-2021-783a157adc ↗
- FEDORA-2021-c1fef03e71 ↗
- FEDORA-2021-15e50503d6 ↗
Record history
Published Nov 12, 2020 · Last refreshed Oct 23, 2026