CVE-2020-25659
medium
CVSS v3
—
CVSS v2
—
VIR risk
5.5
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.
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-25659
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2021:1608
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-25659.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| rocky | 8 | fixed | |
| debian | bookworm | fixed | 3.2.1-1 |
| debian | bullseye | fixed | 3.2.1-1 |
| debian | forky | fixed | 3.2.1-1 |
| debian | sid | fixed | 3.2.1-1 |
| debian | trixie | fixed | 3.2.1-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| PyPI | cryptography | <3.2 | 3.2 |
| PyPI | cryptography | <3.2.1 | 3.2.1 |
References
- https://github.com/pyca/cryptography/security/advisories/GHSA-hggm-jpg3-v476
- https://nvd.nist.gov/vuln/detail/CVE-2020-25659
- https://github.com/pyca/cryptography/pull/5507
- https://github.com/pyca/cryptography/commit/58494b41d6ecb0f56b7c5f05d5f5e3ca0320d494
- https://github.com/advisories/GHSA-hggm-jpg3-v476
- https://github.com/pyca/cryptography
- https://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2021-62.yaml
- https://pypi.org/project/cryptography
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://github.com/pyca/cryptography/pull/5507/commits/ce1bef6f1ee06ac497ca0c837fbd1c7ef6c2472b
- https://www.suse.com/security/cve/CVE-2020-25659.html
- https://errata.rockylinux.org/RLSA-2021:1608
- https://security-tracker.debian.org/tracker/CVE-2020-25659
Verify integrity in audit chain (admin only). AS-IS.