From cd9860af26bf1acb404dc1ab7a2738e817ebcd1f Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ulf=20M=C3=B6ller?= Date: Fri, 3 Dec 1999 23:56:08 +0000 Subject: [PATCH] Circumvent an exploitable buffer overrun error in RSA Security's RSAREF library. See: http://www.CORE-SDI.COM/english/ssh/index.html Submitted by: Reviewed by: PR: --- rsaref/rsaref.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/rsaref/rsaref.c b/rsaref/rsaref.c index 7677eb9fce..1a4c0f378b 100644 --- a/rsaref/rsaref.c +++ b/rsaref/rsaref.c @@ -209,6 +209,11 @@ int RSA_ref_private_decrypt(int len, unsigned char *from, unsigned char *to, if (!RSAref_Private_eay2ref(rsa,&RSAkey)) goto err; + if (len > RSAref_MAX_LEN) + { + RSAREFerr(RSAREF_F_RSA_REF_PRIVATE_DECRYPT,RSAREF_R_LEN); + goto err; + } if ((i=RSAPrivateDecrypt(to,&outlen,from,len,&RSAkey)) != 0) { RSAREFerr(RSAREF_F_RSA_REF_PRIVATE_DECRYPT,i); @@ -232,6 +237,11 @@ int RSA_ref_private_encrypt(int len, unsigned char *from, unsigned char *to, } if (!RSAref_Private_eay2ref(rsa,&RSAkey)) goto err; + if (len + 3 > RSAref_MAX_LEN) + { + RSAREFerr(RSAREF_F_RSA_REF_PRIVATE_ENCRYPT,RSAREF_R_LEN); + goto err; + } if ((i=RSAPrivateEncrypt(to,&outlen,from,len,&RSAkey)) != 0) { RSAREFerr(RSAREF_F_RSA_REF_PRIVATE_ENCRYPT,i); @@ -250,6 +260,12 @@ int RSA_ref_public_decrypt(int len, unsigned char *from, unsigned char *to, if (!RSAref_Public_eay2ref(rsa,&RSAkey)) goto err; + if (len > RSAref_MAX_LEN) + { + RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_DECRYPT,RSAREF_R_LEN); + goto err; + } + goto err; if ((i=RSAPublicDecrypt(to,&outlen,from,len,&RSAkey)) != 0) { RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_DECRYPT,i); @@ -286,6 +302,11 @@ int RSA_ref_public_encrypt(int len, unsigned char *from, unsigned char *to, if (!RSAref_Public_eay2ref(rsa,&RSAkey)) goto err; + if (len + 3 > RSAref_MAX_LEN) + { + RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_ENCRYPT,RSAREF_R_LEN); + goto err; + } if ((i=RSAPublicEncrypt(to,&outlen,from,len,&RSAkey,&rnd)) != 0) { RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_ENCRYPT,i); -- 2.25.1