*** This bug is a duplicate of bug 1103353 ***
https://bugs.launchpad.net/bugs/1103353
** This bug has been marked a duplicate of bug 1103353
Invalid GnuTLS cipher suite strings causes libldap to crash
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https://bugs.launchpad.net/bugs/1026057
Title:
Segfault when setting bad olcTLSCipherSuite
Status in “openldap” package in Ubuntu:
Triaged
Bug description:
Steps to reproduce:
1. Configure olcTLSCertificateFile & olcTLSCertificateKeyFile:
dn: cn=config
changeType: modify
add: olcTLSCertificateFile
olcTLSCertificateFile: /some/valid/pemfile/path
-
add: olcTLSCertificateKeyFile
olcTLSCertificateKeyFile: /some/valid/pemfile/path
(At this point openldap started to support STARTTLS and began working
as a sssd authentication backend.)
2. Try configuring olcTLSCipherSuite to an openssl kind, for example:
dn: cn=config
changeType: modify
add: olcTLSCipherSuite
olcTLSCipherSuite: TLSv1+RSA:!NULL:!EXP
Expected result in gnutls compiled openldap: some kind of refusal of
configuration change (gnutls does not apparently support any kind of
ciphersuite names like openssl).
Actual result: segfault [01-slapd-stderr.log]
Syslog message about crash: kernel: [ 4158.532053] slapd[2696]:
segfault at 7fa824106008 ip 00007fa837ad10b5 sp 00007fa830df8110 error
4 in libc-2.15.so[7fa837a52000+1b3000]
From administrators perspective openldap would be easier to configure
should it be compiled against openssl instead of gnutls as
ciphersuites would be simpler to specify. I'm not aware if openssl
build would crash here as well. Crash is however rather bad indicator
of "unsupported configuration value".
# apt-cache policy slapd
slapd:
Installed: 2.4.28-1.1ubuntu4
Candidate: 2.4.28-1.1ubuntu4
Version table:
*** 2.4.28-1.1ubuntu4 0
500 http://fi.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
100 /var/lib/dpkg/status
# lsb_release -rd
Description: Ubuntu 12.04 LTS
Release: 12.04
# slapd -VVV
@(#) $OpenLDAP: slapd (Apr 5 2012 16:22:20) $
buildd@allspice:/build/buildd/openldap-2.4.28/debian/build/servers/slapd
Included static backends:
config
ldif
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