PT-2018-13427 · Axtls · Axtls

Publicado 2018-11-07 · Atualizado 2019-01-31 · CVE-2018-16149

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Média

Vetor base

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

Name of the Vulnerable Software and Affected Versions axTLS version 2.1.3 and earlier

Description The issue concerns the sig verify() function in x509.c, where the PKCS#1 v1.5 signature verification process blindly trusts the declared lengths in the ASN.1 structure. This can be exploited by a remote attacker using small public exponents to generate crafted signatures for X.509 certificates, potentially causing illegal memory access and crashing the verifier.

Recommendations For axTLS version 2.1.3 and earlier, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Verification of Cryptographic Signature

Enumeração de Fraquezas

CWE-347

Identificadores relacionados

CVE-2018-16149

Produtos afetados

Axtls

Referências · 4

• 🔥 https://sourceforge.net/p/axtls/mailman/message/36459928 · Exploit
• https://github.com/igrr/axtls-8266/commit/5efe2947ab45e81d84b5f707c51d1c64be52f36c · Correção
• https://osv.dev/vulnerability/CVE-2018-16149 · Aviso do Fabricante
• https://nvd.nist.gov/vuln/detail/CVE-2018-16149 · Nota de Segurança