line 727 in imfile.c : memcpy(dirn, inst->pszFileName, i); /* do not copy slash */
On Thu, Mar 3, 2016 at 8:53 AM, Brian Knox <bk...@digitalocean.com> wrote: > I've found a buffer overflow in imfile in the master-candidate branch. To > reproduce, make an imfile config that uses a relative path rather than > absolute to a file: > > ``` > module(load="imfile" PollingInterval="10") > > input( > type="imfile" > tag="crash" > File="crashme" > ) > > *.* /var/log/syslog > ``` > > This results in: > > ``` > 3146.392981790:main thread : deletestateonfiledelete: (unset) > 3146.392987727:main thread : addmetadata: (unset) > 3146.392993638:main thread : addceetag: (unset) > 3146.392999527:main thread : statefile: (unset) > *** buffer overflow detected ***: rsyslogd terminated > ======= Backtrace: ========= > /lib/x86_64-linux-gnu/libc.so.6(+0x7338f)[0x7f286982b38f] > /lib/x86_64-linux-gnu/libc.so.6(__fortify_fail+0x5c)[0x7f28698c2c9c] > /lib/x86_64-linux-gnu/libc.so.6(+0x109b60)[0x7f28698c1b60] > /usr/local/lib/rsyslog/imfile.so(+0x22cd)[0x7f286919f2cd] > /usr/local/lib/rsyslog/imfile.so(+0x254d)[0x7f286919f54d] > rsyslogd(inputProcessCnf+0x99)[0x4147a9] > rsyslogd(cnfDoObj+0x90)[0x414ba0] > rsyslogd(yyparse+0xbae)[0x45435e] > rsyslogd(load+0xc35)[0x414145] > rsyslogd(initAll+0x5ef)[0x448e2f] > rsyslogd(main+0x30)[0x40dfe0] > /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5)[0x7f28697d9ec5] > rsyslogd[0x40e35a] > ``` > > I don't have time to dig into it today but wanted to go ahead and report > it. If I correctly use an absolute path to the file (I used a relative by > mistake when testing and found this), things work as expected. > > If I get some time tomorrow to dig into it I will! > > Cheers, > Brian > > _______________________________________________ rsyslog mailing list http://lists.adiscon.net/mailman/listinfo/rsyslog http://www.rsyslog.com/professional-services/ What's up with rsyslog? Follow https://twitter.com/rgerhards NOTE WELL: This is a PUBLIC mailing list, posts are ARCHIVED by a myriad of sites beyond our control. PLEASE UNSUBSCRIBE and DO NOT POST if you DON'T LIKE THAT.