PT-2018-13428 · Axtls · Axtls

Published 2018-11-07 · Updated 2018-12-13 · CVE-2018-16150

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

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

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

Description The issue concerns the PKCS#1 v1.5 signature verification in the sig verify() function, which does not properly handle excess data after the hash value. This allows a remote attacker to forge signatures, particularly when small public exponents are used, potentially leading to impersonation through fake X.509 certificates.

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

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

CVE-2018-16150

Affected Products

Axtls

References · 4

• https://github.com/igrr/axtls-8266/commit/5efe2947ab45e81d84b5f707c51d1c64be52f36c · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2018-16150 · Security Note
• https://osv.dev/vulnerability/CVE-2018-16150 · Vendor Advisory
• https://sourceforge.net/p/axtls/mailman/message/36459928 · Note