openEuler update for m2crypto

1) Information Exposure Through Timing Discrepancy

EUVDB-ID: #VU65771

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-25657

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 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.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 22.03 LTS

m2crypto-debugsource: before 0.30.1-5

python3-m2crypto: before 0.30.1-5

m2crypto-debuginfo: before 0.30.1-5

m2crypto: before 0.30.1-5

CPE2.3

• cpe:2.3:o:openeuler:openeuler:20.03:LTS SP1:*:*:*:*:*:*
• cpe:2.3:o:openeuler:openeuler:20.03:LTS SP3:*:*:*:*:*:*
• cpe:2.3:o:openeuler:openeuler:22.03:LTS:*:*:*:*:*:*
• cpe:2.3:a:openeuler:m2crypto-debugsource:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:python3-m2crypto:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:m2crypto-debuginfo:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:m2crypto:*:*:*:*:*:openeuler:*:*

External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1852

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.