Medium severity5.9OSV Advisory· Published Nov 7, 2018· Updated Jun 17, 2026
CVE-2018-16149
CVE-2018-16149
Description
In sig_verify() in x509.c in axTLS version 2.1.3 and before, the PKCS#1 v1.5 signature verification blindly trusts the declared lengths in the ASN.1 structure. Consequently, when small public exponents are being used, a remote attacker can generate purposefully crafted signatures (and put them on X.509 certificates) to induce illegal memory access and crash the verifier.
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Affected products
3Patches
Vulnerability mechanics
References
2- github.com/igrr/axtls-8266/commit/5efe2947ab45e81d84b5f707c51d1c64be52f36cnvdPatchThird Party Advisory
- sourceforge.net/p/axtls/mailman/message/36459928/nvdExploitPatchThird Party Advisory
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