#VU86309 Observable discrepancy in Go programming language - CVE-2023-45287

Vulnerability identifier: #VU86309

Vulnerability 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-2023-45287

CWE-ID: CWE-203

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Go programming language
Universal components / Libraries / Scripting languages

Vendor: Google

Description

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

The vulnerability exists due to a timing discrepancy when handling RSA based TLS key exchanges. A remote attacker can perform a Marvin attack and gain access to sensitive information.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Go programming language: 1.0 - 1.0.3, 1.1 - 1.19.13

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External links
http://go.dev/issue/20654
http://go.dev/cl/326012/26
http://groups.google.com/g/golang-announce/c/QMK8IQALDvA
http://people.redhat.com/~hkario/marvin/
http://pkg.go.dev/vuln/GO-2023-2375
http://security.netapp.com/advisory/ntap-20240112-0005/

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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.