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Upstream-Status: Backport
logrotate: fix for CVE-2011-1548
If a logfile is a symlink, it may be read when being compressed, being
copied (copy, copytruncate) or mailed. Secure data (eg. password files)
may be exposed.
Portback nofollow.patch from:
http://logrotate.sourcearchive.com/downloads/3.8.1-5/logrotate_3.8.1-5.debian.tar.gz
Signed-off-by: Wenzong Fan <wenzong.fan@windriver.com>
---
--- a/logrotate.c 2012-09-06 13:25:08.000000000 +0800
+++ b/logrotate.c 2012-09-06 13:35:57.000000000 +0800
@@ -390,7 +390,7 @@
compressedName = alloca(strlen(name) + strlen(log->compress_ext) + 2);
sprintf(compressedName, "%s%s", name, log->compress_ext);
- if ((inFile = open(name, O_RDWR)) < 0) {
+ if ((inFile = open(name, O_RDWR | O_NOFOLLOW)) < 0) {
message(MESS_ERROR, "unable to open %s for compression\n", name);
return 1;
}
@@ -470,7 +470,7 @@
char *mailArgv[] = { mailCommand, "-s", subject, address, NULL };
int rc = 0;
- if ((mailInput = open(logFile, O_RDONLY)) < 0) {
+ if ((mailInput = open(logFile, O_RDONLY | O_NOFOLLOW)) < 0) {
message(MESS_ERROR, "failed to open %s for mailing: %s\n", logFile,
strerror(errno));
return 1;
@@ -561,7 +561,7 @@
message(MESS_DEBUG, "copying %s to %s\n", currLog, saveLog);
if (!debug) {
- if ((fdcurr = open(currLog, (flags & LOG_FLAG_COPY) ? O_RDONLY : O_RDWR)) < 0) {
+ if ((fdcurr = open(currLog, ((flags & LOG_FLAG_COPY) ? O_RDONLY : O_RDWR) | O_NOFOLLOW)) < 0) {
message(MESS_ERROR, "error opening %s: %s\n", currLog,
strerror(errno));
return 1;
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