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Fix unchecked i2d_PrivateKey() return value causing size_t overflow and abort #619

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metsw24-max wants to merge 4 commits into from
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Fix unchecked i2d_PrivateKey() return value causing size_t overflow and abort #619

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5bbf967
add length validation for Lock-Token to prevent underflow
metsw24-max Mar 24, 2026
3538c87
updated
metsw24-max Mar 25, 2026
155b80f
updated
metsw24-max Jun 22, 2026
8848ebd
mod_ssl: fix C90 declaration-after-statement, drop unrelated log change
metsw24-max Jul 6, 2026
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8 changes: 7 additions & 1 deletion modules/ssl/ssl_util.c
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Original file line number Diff line number Diff line change
Expand Up @@ -201,9 +201,15 @@ ssl_asn1_t *ssl_asn1_table_set(apr_hash_t *table, const char *key,
{
apr_ssize_t klen = strlen(key);
ssl_asn1_t *asn1 = apr_hash_get(table, key, klen);
apr_size_t length = i2d_PrivateKey(pkey, NULL);
int derlen = i2d_PrivateKey(pkey, NULL);
apr_size_t length;
unsigned char *p;

/* Encoding the key length can only fail in pathological cases which
* cannot occur for a key which has already been loaded and used. */
ap_assert(derlen > 0);
length = (apr_size_t)derlen;

/* Re-use structure if cached previously. */
if (asn1) {
if (asn1->nData != length) {
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