What is CVE-2019-13629?

CVE-2019-13629 is a medium-severity vulnerability in Matrixssl, classified under Observable Discrepancy. CVSS score: 5.9/10. Published 2019-10-03.

How severe is CVE-2019-13629?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Matrixssl

CVE-2019-13629

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.

EPSS: 0.012 (66.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Matrixssl
N/a — versions n/a

Weakness classification (CWE)

References

cve@mitre.org (x_refsource_MISC, Not Applicable)
cve@mitre.org (x_refsource_MISC, Not Applicable)
cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
cve@mitre.org (Product, x_refsource_MISC)

Frequently asked questions

What is CVE-2019-13629?: CVE-2019-13629 is a medium-severity vulnerability in Matrixssl, classified under Observable Discrepancy. CVSS score: 5.9/10. Published 2019-10-03.
How severe is CVE-2019-13629?: Medium severity. CVSS v3 base score is 5.9 out of 10.