GitHub Advisory DatabaseGHSA-537H-RV9Q-VVPHPython-RSA decryption of ciphertext leads to DoS
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
5 Medium
CVSS2
Access Vector
NETWORK
Access 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
0.002 Low
EPSS
Percentile
64.5%
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).
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
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
5 Medium
CVSS2
Access Vector
NETWORK
Access 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
0.002 Low
EPSS
Percentile
64.5%