CVE-2019-13629

MatrixSSL 4.2.1 and earlier contains a timing side channel in ECDSA signature generation

published October 3, 2019

CVSS
—
EPSS
1%
Percentile
68.9
In the wild
Unconfirmed
What it is

MatrixSSL 4.2.1 and earlier contains a timing side channel in ECDSA signature generation. This allows a local or a remote attacker, able to measure the duration of hundreds to thousands of signing operations, to compute the private key used. The issue occurs because crypto/pubkey/ecc_math.c scalar multiplication leaks the bit length of the scalar.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01240 · 68.9th percentile
Published
2019-10-03T13:23Z
EPSS history
Timeline
  • 03 OCT 13:23Z
    MatrixSSL 4.2.1 and earlier contains a timing side channel in ECDSA signature generation
    cvelistv5