CVE-2025-27587 Affecting libopenssl3 package, versions <3.1.4-150600.5.27.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-SLES156-LIBOPENSSL3-10169611
  • published15 May 2025
  • disclosed14 May 2025

Introduced: 14 May 2025

CVE-2025-27587  (opens in a new tab)

How to fix?

Upgrade SLES:15.6 libopenssl3 to version 3.1.4-150600.5.27.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libopenssl3 package and not the libopenssl3 package as distributed by SLES. See How to fix? for SLES:15.6 relevant fixed versions and status.

OpenSSL 3.0.0 through 3.3.2 on the PowerPC architecture is vulnerable to a Minerva attack, exploitable by measuring the time of signing of random messages using the EVP_DigestSign API, and then using the private key to extract the K value (nonce) from the signatures. Next, based on the bit size of the extracted nonce, one can compare the signing time of full-sized nonces to signatures that used smaller nonces, via statistical tests. There is a side-channel in the P-364 curve that allows private key extraction (also, there is a dependency between the bit size of K and the size of the side channel). NOTE: This CVE is disputed because the OpenSSL security policy explicitly notes that any side channels which require same physical system to be detected are outside of the threat model for the software. The timing signal is so small that it is infeasible to be detected without having the attacking process running on the same physical system.

CVSS Base Scores

version 3.1