From: ProFTPD Maintainance Team
 <pkg-proftpd-maintainers@lists.alioth.debian.org>
Date: Sat, 1 Mar 2025 11:59:24 +0000
Subject: upstream_861_CVE-2019-19269

---
 contrib/mod_tls.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/contrib/mod_tls.c b/contrib/mod_tls.c
index ef7300a..300c442 100644
--- a/contrib/mod_tls.c
+++ b/contrib/mod_tls.c
@@ -5862,6 +5862,9 @@ static int tls_verify_crl(int ok, X509_STORE_CTX *ctx) {
       ASN1_INTEGER *sn;
 
       revoked = sk_X509_REVOKED_value(X509_CRL_get_REVOKED(crl), i);
+      if (revoked == NULL) {
+          continue;
+      }
       sn = revoked->serialNumber;
 
       if (ASN1_INTEGER_cmp(sn, X509_get_serialNumber(xs)) == 0) {
