Comment 0 for bug 1947588

Launching openssl s_server as follows:

$ openssl s_server -nocert -psk 01020304 -dtls1

And using openssl s_client to connect to it like this:

$ openssl s_client -dtls1 -psk 01020304

Results in s_server entering an infinite loop:

Using default temp DH parameters
ACCEPT
ERROR
140247926990208:error:141FC044:SSL routines:tls_setup_handshake:internal error:../ssl/statem/statem_lib.c:109:
ERROR
140247926990208:error:141FC044:SSL routines:tls_setup_handshake:internal error:../ssl/statem/statem_lib.c:109:
ERROR

...and so on...

I have confirmed that upstream OpenSSL does not have this issue in a default build of 1.1.1j or 1.1.1k. Upstream 1.1.1l has a different bug with these commands (https://github.com/openssl/openssl/issues/16707) and it was while working on the fix for that issue (https://github.com/openssl/openssl/pull/16838) that I noticed this problem in the Ubuntu packages.

$ lsb_release -rd
Description: Ubuntu 21.04
Release: 21.04

$ apt-cache policy openssl
openssl:
  Installed: 1.1.1j-1ubuntu3.5
  Candidate: 1.1.1j-1ubuntu3.5
  Version table:
 *** 1.1.1j-1ubuntu3.5 500
        500 http://gb.archive.ubuntu.com/ubuntu hirsute-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu hirsute-security/main amd64 Packages
        100 /var/lib/dpkg/status
     1.1.1j-1ubuntu3 500
        500 http://gb.archive.ubuntu.com/ubuntu hirsute/main amd64 Packages

$ openssl version -a
OpenSSL 1.1.1j 16 Feb 2021
built on: Mon Aug 23 17:02:39 2021 UTC
platform: debian-amd64
options: bn(64,64) rc4(16x,int) des(int) blowfish(ptr)
compiler: gcc -fPIC -pthread -m64 -Wa,--noexecstack -Wall -Wa,--noexecstack -g -O2 -ffile-prefix-map=/build/openssl-5U8yxE/openssl-1.1.1j=. -flto=auto -ffat-lto-objects -fstack-protector-strong -Wformat -Werror=format-security -DOPENSSL_TLS_SECURITY_LEVEL=2 -DOPENSSL_USE_NODELETE -DL_ENDIAN -DOPENSSL_PIC -DOPENSSL_CPUID_OBJ -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DKECCAK1600_ASM -DRC4_ASM -DMD5_ASM -DAESNI_ASM -DVPAES_ASM -DGHASH_ASM -DECP_NISTZ256_ASM -DX25519_ASM -DPOLY1305_ASM -DNDEBUG -Wdate-time -D_FORTIFY_SOURCE=2
OPENSSLDIR: "/usr/lib/ssl"
ENGINESDIR: "/usr/lib/x86_64-linux-gnu/engines-1.1"
Seeding source: os-specific