Vulnerability · Published Jan 11, 2021 · Assigned by redhat
CVE-2020-25659
Medium 5.9
In plain English
A medium-severity security flaw in python-cryptography. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.5% (higher than 85% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.9Medium
Exploit odds (30 days)2.5%top 15.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
python-cryptography 3.2 is vulnerable to Bleichenbacher timing attacks in the RSA decryption API, via timed processing of valid PKCS#1 v1.5 ciphertext.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | py3-cryptography | 3.2.1-r0 | ALPINE-CVE-2020-25659 |
| Alpine:v3.21 | py3-cryptography | 3.2.1-r0 | ALPINE-CVE-2020-25659 |
| Alpine:v3.22 | py3-cryptography | 3.2.1-r0 | ALPINE-CVE-2020-25659 |
| Alpine:v3.23 | py3-cryptography | 3.2.1-r0 | ALPINE-CVE-2020-25659 |
| Alpine:v3.24 | py3-cryptography | 3.2.1-r0 | ALPINE-CVE-2020-25659 |
| Debian:12 | python-cryptography | 3.2.1-1 | DEBIAN-CVE-2020-25659 |
| Debian:13 | python-cryptography | 3.2.1-1 | DEBIAN-CVE-2020-25659 |
| Debian:14 | python-cryptography | 3.2.1-1 | DEBIAN-CVE-2020-25659 |
| PyPI | cryptography | 3.2.1 | PYSEC-2021-62 |
| PyPI | cryptography | 3.2 | GHSA-hggm-jpg3-v476 |
| Rocky Linux:8 | python-cryptography | 0:3.2.1-4.el8 | RLSA-2021:1608 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | python-cryptography | python-cryptography 3.2 |
Weakness: CWE-385
References
- https://github.com/pyca/cryptography/pull/5507/commits/ce1bef6f1ee06ac497ca0c837fbd1c7ef6c2472b x_refsource_MISC
- https://www.oracle.com/security-alerts/cpuapr2022.html x_refsource_MISC
- https://www.oracle.com/security-alerts/cpujul2022.html x_refsource_MISC