Vulnerability identifier: #VU104032
Vulnerability risk: Medium
CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID:
CWE-ID:
CWE-208
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
M2Crypto
Other software /
Other software solutions
Vendor: Ng Pheng Siong
Description
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to possibility of the Bleichenbacher timing attack in the RSA decryption API via the timed processing of valid PKCS#1 v1.5 Ciphertext. A remote attacker can gain access to sensitive information.
Note, the vulnerability exists due ti incomplete fix for #VU65771 (CVE-2020-25657).
Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
The vulnerability is partially solved with OpenSSL update if the default provider is in use (e.g. won't help with pkcs11 provider).
Vulnerable software versions
M2Crypto: 0.11 - 0.44.0
External links
https://access.redhat.com/security/cve/CVE-2023-50781
https://bugzilla.redhat.com/show_bug.cgi?id=2254426
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.