Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: openldap (Ubuntu Bionic) Status: New => Confirmed
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openldap in Ubuntu. https://bugs.launchpad.net/bugs/1838370 Title: slapd segfault on filter parse error Status in openldap: Fix Released Status in openldap package in Ubuntu: Confirmed Status in openldap source package in Xenial: Confirmed Status in openldap source package in Bionic: Confirmed Status in openldap source package in Disco: Confirmed Bug description: Hello! We have faced slapd crash, seems an attacker was trying to brute force one of our services and uid parsing failures caused slapd crash: Jul 26 18:59:47 slapd[1252]: conn=1466 op=13 SRCH base="ou=test,dc=test,dc=com" scope=2 deref=0 filter="(&(uid=aistar123<>!n)(objectClass=posixAccount)(uid=*)(&(uidNumber=*)(!(uidNumber=0))))" Jul 26 18:59:47 slapd[1252]: conn=1466 op=13 SRCH attr=objectClass uid userPassword uidNumber gidNumber gecos homeDirectory loginShell krbPrincipalName cn memberOf modifyTimestamp modifyTimestamp shadowLastChange shadowMin shadow Max shadowWarning shadowInactive shadowExpire shadowFlag krbLastPwdChange krbPasswordExpiration pwdAttribute authorizedService accountExpires userAccountControl nsAccountLock host loginDisabled loginExpirationTime loginAllowedTimeMap sshPublic Key Jul 26 18:59:47 slapd[1252]: conn=1466 op=13 SEARCH RESULT tag=101 err=0 nentries=0 text=massaged filter parse error Jul 26 18:59:47 kernel: [ 9441.554161] slapd[2367]: segfault at 18 ip 00007fc8d18ec512 sp 00007fc8889e2810 error 4 in libc-2.23.so [7fc8d1868000+1c0000] Another faulty filter example: filter="(&(uid=sql<>?)(objectClass=posixAccount)(&(uidNumber=*)(!(uidNumber=0))))" filter="(&(uid=fugeone<>?123)(objectClass=posixAccount)(uid=*)(&(uidNumber=*)(!(uidNumber=0))))" $ lsb_release -rd Description: Ubuntu 16.04.5 LTS Release: 16.04 $ slapd -VVV @(#) $OpenLDAP: slapd (Ubuntu) (May 22 2018 13:54:12) $ buildd@lcy01-amd64-019 :/build/openldap-t_Ta0O/openldap-2.4.42+dfsg/debian/build/servers/slapd Included static backends: config ldif $ apt-cache policy slapd slapd: Installed: 2.4.42+dfsg-2ubuntu3.3 Candidate: 2.4.42+dfsg-2ubuntu3.5 Version table: 2.4.42+dfsg-2ubuntu3.5 500 500 http://nl.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages *** 2.4.42+dfsg-2ubuntu3.3 100 100 /var/lib/dpkg/status 2.4.42+dfsg-2ubuntu3.2 500 500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages 2.4.42+dfsg-2ubuntu3 500 500 http://nl.archive.ubuntu.com/ubuntu xenial/main amd64 Packages affects ubuntu/openldap To manage notifications about this bug go to: https://bugs.launchpad.net/openldap/+bug/1838370/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp