File apache2-CVE-2020-11984.patch of Package apache2.27541
--- 2.4.x/modules/proxy/mod_proxy_uwsgi.c 2020/07/24 09:31:46 1880250
+++ 2.4.x/modules/proxy/mod_proxy_uwsgi.c 2020/07/24 09:35:25 1880251
@@ -136,7 +136,7 @@
int j;
apr_size_t headerlen = 4;
- apr_uint16_t pktsize, keylen, vallen;
+ apr_size_t pktsize, keylen, vallen;
const char *script_name;
const char *path_info;
const char *auth;
@@ -178,6 +178,15 @@
headerlen += 2 + strlen(env[j].key) + 2 + strlen(env[j].val);
}
+ pktsize = headerlen - 4;
+ if (pktsize > APR_UINT16_MAX) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10259)
+ "can't send headers to %s:%u: packet size too "
+ "large (%" APR_SIZE_T_FMT ")",
+ conn->hostname, conn->port, pktsize);
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
ptr = buf = apr_palloc(r->pool, headerlen);
ptr += 4;
@@ -196,8 +205,6 @@
ptr += vallen;
}
- pktsize = headerlen - 4;
-
buf[0] = 0;
buf[1] = (apr_byte_t) (pktsize & 0xff);
buf[2] = (apr_byte_t) ((pktsize >> 8) & 0xff);