I had same problem on Ubuntu 18.04 host. stunnel4 -v [ ] Clients allowed=500 [.] stunnel 5.44 on x86_64-pc-linux-gnu platform [.] Compiled with OpenSSL 1.1.0g 2 Nov 2017 [.] Running with OpenSSL 1.1.1 11 Sep 2018 [.] Update OpenSSL shared libraries or rebuild stunnel [.] Threading:PTHREAD Sockets:POLL,IPv6,SYSTEMD TLS:ENGINE,FIPS,OCSP,PSK,SNI Auth:LIBWRAP [ ] errno: (*__errno_location ()) [!] Invalid configuration file name "-v" [!] realpath: No such file or directory (2)
I found "Double free attempt" messages before INTERNAL ERROR in the log file. 2019.12.09 21:21:06 LOG5[ui]: Terminated 2019.12.09 21:21:06 LOG2[ui]: Double free attempt: ptr=0x7f48b000e680 alloc=client.c:1398 free#1=client.c:1410 free#2=ssl.c:117 2019.12.09 21:21:06 LOG2[ui]: Double free attempt: ptr=0x7f48ac007610 alloc=client.c:1398 free#1=client.c:1410 free#2=ssl.c:117 INTERNAL ERROR: Bad magic at ssl.c, line 117 ----- 2019.12.10 12:26:02 LOG5[ui]: Terminated 2019.12.10 12:26:02 LOG2[ui]: Double free attempt: ptr=0x7f8e3c005480 alloc=../crypto/evp/digest.c:51 free#1=../crypto/evp/digest.c:57 free#2=ssl.c:117 INTERNAL ERROR: Bad magic at ssl.c, line 117 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1847275 Title: stunnel4: "INTERNAL ERROR: Bad magic at ssl.c, line 117" - DoS vulnerability To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/stunnel4/+bug/1847275/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
