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Merge pull request #10861 from padelsbach/asn-integer-overflow-copy

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Fix possible memcpy length overflow in wolfSSL_d2i_ASN1_INTEGER
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David Garske
2026-07-08 15:20:05 -07:00
committed by GitHub
parent a5dbbf80f5 f842e33145
commit a4aab71ffe
2 changed files with 13 additions and 0 deletions
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src/ssl_asn1.c
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@@ -1459,6 +1459,11 @@ WOLFSSL_ASN1_INTEGER* wolfSSL_d2i_ASN1_INTEGER(WOLFSSL_ASN1_INTEGER** a,
WOLFSSL_MSG("ASN.1 length not valid.");
err = 1;
}
/* Check that len + idx won't overflow a signed int */
if ((!err) && (len > INT_MAX - (int)idx)) {
WOLFSSL_MSG("ASN.1 length too large.");
err = 1;
}
/* Allocate a new ASN.1 INTEGER object. */
if ((!err) && ((ret = wolfSSL_ASN1_INTEGER_new()) == NULL)) {
err = 1;