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reject zero length point format list or supported curves extensions

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This commit is contained in:
Dr. Stephen Henson 2012-11-22 14:15:25 +00:00
parent eb3a3911fc
commit 7c3562947a
1 changed files with 4 additions and 2 deletions
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6
ssl/t1_lib.c
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@ -1077,7 +1077,8 @@ int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, in
int ellipticcurvelist_length = (*(sdata++) << 8);
ellipticcurvelist_length += (*(sdata++));
if (ellipticcurvelist_length != size - 2)
if (ellipticcurvelist_length != size - 2 ||
ellipticcurvelist_length < 1)
{
*al = TLS1_AD_DECODE_ERROR;
return 0;
@ -1433,7 +1434,8 @@ int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, in
unsigned char *sdata = data;
int ecpointformatlist_length = *(sdata++);
if (ecpointformatlist_length != size - 1)
if (ecpointformatlist_length != size - 1 ||
ecpointformatlist_length < 1)
{
*al = TLS1_AD_DECODE_ERROR;
return 0;