GitHub Advisory DatabaseGHSA-537H-RV9Q-VVPHPython-RSA decryption of ciphertext leads to DoS
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
0.002 Low
EPSS
Percentile
64.8%
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).
Affected configurations
References
github.com/advisories/GHSA-537h-rv9q-vvph
github.com/sybrenstuvel/python-rsa/issues/146
github.com/sybrenstuvel/python-rsa/issues/146#issuecomment-641845667
lists.fedoraproject.org/archives/list/[email protected]/message/2KILTHBHNSDUCYV22ODLOKTICJJ7JQIQ/
lists.fedoraproject.org/archives/list/[email protected]/message/ZYB65VNILRBTXL6EITQTH2PZPK7I23MW/
nvd.nist.gov/vuln/detail/CVE-2020-13757
usn.ubuntu.com/4478-1/
Related
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
0.002 Low
EPSS
Percentile
64.8%