Vulnerability Description
Python-RSA before 4.1 ignores leading '\0' bytes during decryption of ciphertext. This could conceivably have a security-relevant impact, e.g., by helping an attacker to infer that an application uses Python-RSA, or if the length of accepted ciphertext affects application behavior (such as by causing excessive memory allocation).
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Python-Rsa Project | Python-Rsa | < 4.1 |
| Fedoraproject | Fedora | 31 |
| Canonical | Ubuntu Linux | 14.04 |
Related Weaknesses (CWE)
References
- https://github.com/sybrenstuvel/python-rsa/issues/146Issue TrackingThird Party Advisory
- https://github.com/sybrenstuvel/python-rsa/issues/146#issuecomment-641845667ExploitIssue TrackingThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://usn.ubuntu.com/4478-1/Third Party Advisory
- https://github.com/sybrenstuvel/python-rsa/issues/146Issue TrackingThird Party Advisory
- https://github.com/sybrenstuvel/python-rsa/issues/146#issuecomment-641845667ExploitIssue TrackingThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://usn.ubuntu.com/4478-1/Third Party Advisory
FAQ
What is CVE-2020-13757?
CVE-2020-13757 is a vulnerability with a CVSS score of 7.5 (HIGH). Python-RSA before 4.1 ignores leading '\0' bytes during decryption of ciphertext. This could conceivably have a security-relevant impact, e.g., by helping an attacker to infer that an application uses...
How severe is CVE-2020-13757?
CVE-2020-13757 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-13757?
Check the references section above for vendor advisories and patch information. Affected products include: Python-Rsa Project Python-Rsa, Fedoraproject Fedora, Canonical Ubuntu Linux.