CVE-2020-13757

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, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, 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)	buster	4.0-2	vulnerable
	bullseye	4.0-4	vulnerable
	bookworm, sid	4.8-1	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)