Upstream information
Description
The (1) otrl_base64_otr_decode function in src/b64.c; (2) otrl_proto_data_read_flags and (3) otrl_proto_accept_data functions in src/proto.c; and (4) decode function in toolkit/parse.c in libotr before 3.2.1 allocates a zero-length buffer when decoding a base64 string, which allows remote attackers to cause a denial of service (application crash) via a message with the value "?OTR:===.", which triggers a heap-based buffer overflow.NVD CVSS v2 Base Score: 4.3 (AV:N/AC:M/Au:N/C:N/I:N/A:P)
Novell/SUSE information
Novell Bugzilla entry: 777468, 789190 SUSE Security Advisories:- SUSE-SU-2012:1578-1, published Wed, 28 Nov 2012 00:09:21 +0100 (CET)
- openSUSE-SU-2012:1525-1, published Thu, 22 Nov 2012 11:14:07 +0100 (CET)
- openSUSE-SU-2013:0155-1, published Wed, 23 Jan 2013 14:06:13 +0100 (CET)