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fix disque-cli buffer overflow (related to CVE-2018-12326) #217

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fix disque-cli buffer overflow (related to CVE-2018-12326) #217

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25 changes: 14 additions & 11 deletions src/disque-cli.c
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Original file line number Diff line number Diff line change
Expand Up @@ -122,20 +122,23 @@ static long long mstime(void) {
}

static void cliRefreshPrompt(void) {
int len;
sds prompt = sdsempty();
if (config.hostsocket != NULL) {
prompt = sdscatfmt(prompt,"disque %s",config.hostsocket);
} else {
char addr[256];
anetFormatAddr(addr, sizeof(addr), config.hostip, config.hostport);
prompt = sdscatlen(prompt,addr,strlen(addr));
}

if (config.hostsocket != NULL)
len = snprintf(config.prompt,sizeof(config.prompt),"disque %s",
config.hostsocket);
else
len = snprintf(config.prompt,sizeof(config.prompt),
strchr(config.hostip,':') ? "[%s]:%d" : "%s:%d",
config.hostip, config.hostport);
/* Add [dbnum] if needed */
if (config.dbnum != 0 && config.last_cmd_type != REDIS_REPLY_ERROR)
len += snprintf(config.prompt+len,sizeof(config.prompt)-len,"[%d]",
config.dbnum);
snprintf(config.prompt+len,sizeof(config.prompt)-len,"> ");
prompt = sdscatfmt(prompt,"[%i]",config.dbnum);

/* Copy the prompt in the static buffer. */
prompt = sdscatlen(prompt,"> ",2);
snprintf(config.prompt,sizeof(config.prompt),"%s",prompt);
sdsfree(prompt);
}

/*------------------------------------------------------------------------------
Expand Down