PT-2019-13454 · Wolfssl · Wolfssl+1

Keegan Ryan · Published 2019-10-03 · Updated 2022-05-24 · CVE-2019-13628

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions wolfSSL and wolfCrypt versions 4.0.0 and earlier

Description The issue is a timing side channel in ECDSA signature generation, which allows a local attacker to infer information about the nonces used and potentially recover the private key. This occurs because the scalar multiplication in ecc.c might leak the bit length, enabling a lattice attack. The attacker must be able to precisely measure the duration of signature operations.

Recommendations For wolfSSL and wolfCrypt versions 4.0.0 and earlier, consider configuring with --enable-fpecc, --enable-sp, or --enable-sp-math to mitigate the issue. As a temporary workaround, restrict access to the ecc.c scalar multiplication function to minimize the risk of exploitation.

Fix

Side Channel Attack

Weakness Enumeration

CWE-203

Related Identifiers

CVE-2019-13628

GHSA-Q95H-VC86-HV77

Affected Products

Wolfcrypt

Wolfssl

References · 14

• https://osv.dev/vulnerability/UBUNTU-CVE-2019-13628 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-13628 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-13628 · Security Note
• https://cve.org/CVERecord?id=CVE-2019-13628 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-13628 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-q95h-vc86-hv77 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-13628 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2019-13628 · Vendor Advisory
• https://github.com/wolfSSL/wolfssl/pull/2353 · Note
• https://github.com/wolfSSL/wolfcrypt-py · Note
• http://openwall.com/lists/oss-security/2019/10/02/2 · Note
• https://minerva.crocs.fi.muni.cz · Note
• https://tches.iacr.org/index.php/TCHES/article/view/7337 · Note
• https://eprint.iacr.org/2011/232.pdf · Note