Vulnerability in Python-Rsa Project
CVE-2020-13757
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).
Vulnerability class: POODLE (CVE-2014-3566)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.014 (71.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: +0.000
Affected products
- Python-Rsa Project
- Canonical Ubuntu Linux — versions 14.04
- Fedoraproject Fedora — versions 31, 32
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/sybrenstuvel/python-rsa/issues/146 (Third Party Advisory, Issue Tracking)
- github.com/sybrenstuvel/python-rsa/issues/146 (Exploit, Third Party Advisory, Issue Tracking)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- usn.ubuntu.com/4478-1/ (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-13757?
- CVE-2020-13757 is a high-severity vulnerability in Python-Rsa Project, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 7.5/10. Published 2020-06-01.
- How severe is CVE-2020-13757?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-13757 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.