Covert timing channel in IBM Robotic Process Automation for Cloud Pak



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-4421
CWE-ID CWE-385
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Robotic Process Automation for Cloud Pak
Other software / Other software solutions

Vendor IBM Corporation

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Covert Timing Channel

EUVDB-ID: #VU84108

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-4421

CWE-ID: CWE-385 - Covert Timing Channel

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to NSS code used for checking PKCS#1 v1.5 was leaking information useful in mounting Bleichenbacher-like attacks. Both the overall correctness of the padding as well as the length of the encrypted message was leaking through timing side-channel. By sending large number of attacker-selected ciphertexts, the attacker would be able to decrypt a previously intercepted PKCS#1 v1.5 ciphertext (for example, to decrypt a TLS session that used RSA key exchange), or forge a signature using the victim's key.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Robotic Process Automation for Cloud Pak: 21.0.1 - 23.0.11

CPE2.3 External links

https://www.ibm.com/support/pages/node/7107367


Q & A

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.



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