CVE-2020-25659
MEDIUM5.9EPSS 0.76%RSA decryption vulnerable to Bleichenbacher timing vulnerability
Published: 10/27/2020Modified: 4/28/2026
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 (4)
- Alpine/py3-cryptographyfrom 0, < 3.2.1-r0
- Debian/python-cryptographyfrom 0, < 3.2.1-1
- PyPI/cryptographyfrom 0, < 3.2
- PyPI/cryptographyfrom 0, < 3.2.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
References (13)
- ADVISORYhttps://github.com/advisories/GHSA-hggm-jpg3-v476
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2020-25659
- ADVISORYhttps://security.alpinelinux.org/vuln/CVE-2020-25659
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2020-25659
- PATCHhttps://github.com/pyca/cryptography
- WEBhttps://github.com/pyca/cryptography/commit/58494b41d6ecb0f56b7c5f05d5f5e3ca0320d494
- WEBhttps://github.com/pyca/cryptography/pull/5507
- WEBhttps://github.com/pyca/cryptography/pull/5507/commits/ce1bef6f1ee06ac497ca0c837fbd1c7ef6c2472b
- WEBhttps://github.com/pyca/cryptography/security/advisories/GHSA-hggm-jpg3-v476
- WEBhttps://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2021-62.yaml
- WEBhttps://pypi.org/project/cryptography
- WEBhttps://www.oracle.com/security-alerts/cpuapr2022.html
- WEBhttps://www.oracle.com/security-alerts/cpujul2022.html