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.
Advisories
Source ID Title
EUVD EUVD EUVD-2018-8004 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.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-05T10:17:37.778Z

Reserved: 2018-08-29T00:00:00

Link: CVE-2018-16149

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2018-11-07T20:29:00.557

Modified: 2024-11-21T03:52:10.320

Link: CVE-2018-16149

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.