Vulnerability · Published Jun 1, 2020 · Assigned by mitre
CVE-2020-13757
High 7.5
In plain English
A high-severity security flaw in the python-rsa package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 73% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.4%top 26.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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).
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | python-rsa | 4.7.2-1 | DEBIAN-CVE-2020-13757 |
| Debian:13 | python-rsa | 4.7.2-1 | DEBIAN-CVE-2020-13757 |
| Debian:14 | python-rsa | 4.7.2-1 | DEBIAN-CVE-2020-13757 |
| PyPI | rsa | 4.1 | GHSA-537h-rv9q-vvph |
| PyPI | rsa | 4.1 | PYSEC-2020-99 |
Affected products (as reported)
References
- https://github.com/sybrenstuvel/python-rsa/issues/146 x_refsource_MISC
- https://github.com/sybrenstuvel/python-rsa/issues/146#issuecomment-641845667 x_refsource_CONFIRM
- FEDORA-2020-253ebe55ff vendor-advisory, x_refsource_FEDORA
- FEDORA-2020-5ed5627d2b vendor-advisory, x_refsource_FEDORA
- USN-4478-1 vendor-advisory, x_refsource_UBUNTU