| Name | CVE-2020-13757 |
| 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). |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 962142 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| python-rsa (PTS) | jessie | 3.1.4-1+deb8u1 | vulnerable |
| stretch | 3.4.2-1 | vulnerable |
| buster | 4.0-2 | vulnerable |
| bullseye | 4.0-4 | vulnerable |
| bookworm | 4.8-1 | fixed |
| sid, trixie | 4.9-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| python-rsa | source | (unstable) | 4.7.2-1 | | | 962142 |
Notes
[bullseye] - python-rsa <no-dsa> (Minor issue)
[buster] - python-rsa <no-dsa> (Minor issue)
[stretch] - python-rsa <no-dsa> (Minor issue)
[jessie] - python-rsa <no-dsa> (Minor issue)
https://github.com/sybrenstuvel/python-rsa/issues/146
https://github.com/sybrenstuvel/python-rsa/commit/93af6f2f89a9bf28361e67716c4240e691520f30 (version-4.1)