CVE-2018-16149
Last modified
CVE-2018-16149 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.70% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Axtls Project | Axtls | <= 2.1.3 |
References
- https://github.com/igrr/axtls-8266/commit/5efe2947ab45e81d84b5f707c51d1c64be52f36cPatch, Third Party Advisory
- https://sourceforge.net/p/axtls/mailman/message/36459928/Exploit, Patch, Third Party Advisory
- https://github.com/igrr/axtls-8266/commit/5efe2947ab45e81d84b5f707c51d1c64be52f36cPatch, Third Party Advisory
- https://sourceforge.net/p/axtls/mailman/message/36459928/Exploit, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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