CVE-2025-27587

EUVD-2025-18430
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.3 MEDIUM
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 45%
Debian logo
Debian Releases
Debian Product
Codename
openssl
bookworm
unimportant
bookworm (security)
unimportant
bullseye
unimportant
bullseye (security)
unimportant
forky
3.6.2-1
fixed
sid
3.6.2-1
fixed
trixie
3.5.6-1~deb13u1
fixed
trixie (security)
3.5.5-1~deb13u2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
openssl1.0
bionic
not-affected
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
nodejs
bionic
ignored
focal
not-affected
jammy
ignored
noble
not-affected
oracular
not-affected
plucky
not-affected
questing
not-affected
trusty
not-affected
xenial
ignored
edk2
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
oracular
ignored
plucky
not-affected
questing
not-affected
xenial
not-affected
openssl
bionic
not-affected
focal
not-affected
jammy
ignored
noble
ignored
oracular
ignored
plucky
not-affected
questing
not-affected
trusty
not-affected
xenial
not-affected
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
libopenssl-3-devel
suse enterprise desktop 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise desktop 15 SP7
3.2.3-150700.5.10.1
fixed
suse enterprise sap 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise sap 15 SP7
3.2.3-150700.5.10.1
fixed
suse enterprise server 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise server 15 SP7
3.2.3-150700.5.10.1
fixed
libopenssl-3-fips-provider
suse enterprise desktop 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise desktop 15 SP7
3.2.3-150700.5.10.1
fixed
suse enterprise sap 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise sap 15 SP7
3.2.3-150700.5.10.1
fixed
suse enterprise server 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise server 15 SP7
3.2.3-150700.5.10.1
fixed
libopenssl-3-fips-provider-32bit
suse enterprise desktop 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise desktop 15 SP7
3.2.3-150700.5.10.1
fixed
suse enterprise sap 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise sap 15 SP7
3.2.3-150700.5.10.1
fixed
suse enterprise server 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise server 15 SP7
3.2.3-150700.5.10.1
fixed
libopenssl3
suse enterprise desktop 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise desktop 15 SP7
3.2.3-150700.5.10.1
fixed
suse enterprise sap 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise sap 15 SP7
3.2.3-150700.5.10.1
fixed
suse enterprise server 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise server 15 SP7
3.2.3-150700.5.10.1
fixed
libopenssl3-32bit
suse enterprise desktop 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise desktop 15 SP7
3.2.3-150700.5.10.1
fixed
suse enterprise sap 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise sap 15 SP7
3.2.3-150700.5.10.1
fixed
suse enterprise server 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise server 15 SP7
3.2.3-150700.5.10.1
fixed
openssl-3
suse enterprise desktop 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise desktop 15 SP7
3.2.3-150700.5.10.1
fixed
suse enterprise sap 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise sap 15 SP7
3.2.3-150700.5.10.1
fixed
suse enterprise server 15 SP6
3.1.4-150600.5.27.1
fixed
suse enterprise server 15 SP7
3.2.3-150700.5.10.1
fixed