bitlbee-libpurple before 3.5.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) and possibly execute arbitrary code via a file transfer request for a contact that is not in the contact list. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-10189.

References

• https://nvd.nist.gov/vuln/detail/CVE-2017-5668
• bitlbee/bitlbee@30d598c
• https://bugs.bitlbee.org/ticket/1282
• http://www.openwall.com/lists/oss-security/2017/01/30/4
• http://www.openwall.com/lists/oss-security/2017/01/31/11
• http://www.securityfocus.com/bid/95932