CVSS: 5.3EPSS: 0%CPEs: 1EXPL: 0CVE-2019-14317
https://notcve.org/view.php?id=CVE-2019-14317
wolfSSL and wolfCrypt 4.1.0 and earlier (formerly known as CyaSSL) generate biased DSA nonces. This allows a remote attacker to compute the long term private key from several hundred DSA signatures via a lattice attack. The issue occurs because dsa.c fixes two bits of the generated nonces. wolfSSL and wolfCrypt versión 4.1.0 y anteriores (anteriormente conocido como CyaSSL), generan nonces DSA sesgados. Esto permite a un atacante remoto calcular la clave privada a largo plazo de varios cientos de firmas DSA por medio de un ataque de tipo lattice. El problema se presenta porque el archivo dsa.c corrige dos bits de los nonces generados. • https://www.wolfssl.com/docs/security-vulnerabilities • CWE-331: Insufficient Entropy •
CVSS: 4.7EPSS: 0%CPEs: 1EXPL: 0CVE-2019-13628
https://notcve.org/view.php?id=CVE-2019-13628
wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or --enable-sp-math) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length. wolfSSL y wolfCrypt versión 4.0.0 y anteriores (cuando se configuran sin --enable-fpecc, --enable-sp o --enable-sp-math) contienen un canal lateral de temporización en la generación de firmas ECDSA. Esto permite a un atacante local, capaz de medir con precisión la duración de las operaciones de firma, inferir información acerca del nonces utilizado y potencialmente montar un ataque de red para recuperar la clave privada usada. El problema se presenta porque la multiplicación escalar del archivo ecc.c podría perder la longitud de bits. • http://www.openwall.com/lists/oss-security/2019/10/02/2 https://eprint.iacr.org/2011/232.pdf https://minerva.crocs.fi.muni.cz https://tches.iacr.org/index.php/TCHES/article/view/7337 • CWE-203: Observable Discrepancy •
CVSS: 9.8EPSS: 0%CPEs: 1EXPL: 0CVE-2019-16748
https://notcve.org/view.php?id=CVE-2019-16748
In wolfSSL through 4.1.0, there is a missing sanity check of memory accesses in parsing ASN.1 certificate data while handshaking. Specifically, there is a one-byte heap-based buffer over-read in CheckCertSignature_ex in wolfcrypt/src/asn.c. En wolfSSL versiones hasta 4.1.0, se presenta una falta de comprobación de saneamiento de los accesos a la memoria en el análisis de los datos del certificado ASN.1 durante el protocolo de negociación (handshaking). Específicamente, se presenta una lectura excesiva de búfer en la región heap de la memoria de un byte en la función CheckCertSignature_ex en el archivo wolfcrypt/src/asn.c. • https://github.com/wolfSSL/wolfssl/issues/2459 • CWE-125: Out-of-bounds Read •
CVSS: 9.8EPSS: 10%CPEs: 1EXPL: 0CVE-2019-11873
https://notcve.org/view.php?id=CVE-2019-11873
wolfSSL 4.0.0 has a Buffer Overflow in DoPreSharedKeys in tls13.c when a current identity size is greater than a client identity size. An attacker sends a crafted hello client packet over the network to a TLSv1.3 wolfSSL server. The length fields of the packet: record length, client hello length, total extensions length, PSK extension length, total identity length, and identity length contain their maximum value which is 2^16. The identity data field of the PSK extension of the packet contains the attack data, to be stored in the undefined memory (RAM) of the server. The size of the data is about 65 kB. • http://www.securityfocus.com/bid/108466 https://www.telekom.com/en/corporate-responsibility/data-protection-data-security/security/details/advisories-504842 https://www.telekom.com/resource/blob/572524/1c89c1cbaccdf792153063b3a10af10e/dl-190515-remote-buffer-overflow-vulnerability-wolfssl-library-data.pdf • CWE-787: Out-of-bounds Write •