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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 14:15:44 +00:00
parent 1740c9fbfc
commit e83aefb3a0
1 changed files with 4 additions and 2 deletions
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6
ssl/t1_lib.c
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@ -1853,7 +1853,8 @@ static int ssl_scan_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char
unsigned char *sdata = data; unsigned char *sdata = data;
int ecpointformatlist_length = *(sdata++); int ecpointformatlist_length = *(sdata++);
if (ecpointformatlist_length != size - 1) if (ecpointformatlist_length != size - 1 ||
ecpointformatlist_length < 1)
{ {
*al = TLS1_AD_DECODE_ERROR; *al = TLS1_AD_DECODE_ERROR;
return 0; return 0;
@ -1889,7 +1890,8 @@ static int ssl_scan_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char
int ellipticcurvelist_length = (*(sdata++) << 8); int ellipticcurvelist_length = (*(sdata++) << 8);
ellipticcurvelist_length += (*(sdata++)); ellipticcurvelist_length += (*(sdata++));
if (ellipticcurvelist_length != size - 2) if (ellipticcurvelist_length != size - 2 ||
ellipticcurvelist_length < 1)
{ {
*al = TLS1_AD_DECODE_ERROR; *al = TLS1_AD_DECODE_ERROR;
return 0; return 0;