SUSE update for bouncycastle

1) Information Exposure Through Timing Discrepancy

EUVDB-ID: #VU55035

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: CVE-2020-15522

CWE-ID: CWE-208 - Information Exposure Through Timing Discrepancy

Exploit availability: No

Description

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

The vulnerability exists due to a timing issue within the EC math library. A remote attacker who can observe timing information for the generation of multiple deterministic ECDSA signatures is able to reconstruct the private key used for encryption.

Mitigation

Update the affected package bouncycastle to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Development Tools: 15-SP2 - 15-SP3

bouncycastle-pg: before 1.64-3.3.1

bouncycastle: before 1.64-3.3.1

CPE2.3

• cpe:2.3:o:suse:suse_linux_enterprise_module_for_development_tools:15-SP2:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_module_for_development_tools:15-SP3:*:*:*:*:*:*:*
• cpe:2.3:a:suse:bouncycastle-pg:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:bouncycastle:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212163-1/

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.