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CVE-2020-8597: pppd: Fix bounds check in EAP code · ppp-project/ppp@8d7970b
eap.c in pppd in ppp 2.4.2 through 2.4.8 has an rhostname buffer overflow in the eap_request and eap_response functions.
Expand Up @@ -1420,7 +1420,7 @@ int len; }
/* Not so likely to happen. */ if (vallen >= len + sizeof (rhostname)) { if (len - vallen >= sizeof (rhostname)) { dbglog(“EAP: trimming really long peer name down”); BCOPY(inp + vallen, rhostname, sizeof (rhostname) - 1); rhostname[sizeof (rhostname) - 1] = '\0’; Expand Down Expand Up @@ -1846,7 +1846,7 @@ int len; }
/* Not so likely to happen. */ if (vallen >= len + sizeof (rhostname)) { if (len - vallen >= sizeof (rhostname)) { dbglog(“EAP: trimming really long peer name down”); BCOPY(inp + vallen, rhostname, sizeof (rhostname) - 1); rhostname[sizeof (rhostname) - 1] = '\0’; Expand Down
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