CVE-2012-3461
libotr - buffer overflow
EPSS 3.4%
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.
How to fix CVE-2012-3461
To remediate CVE-2012-3461, upgrade the affected package to a fixed version below.
- Debian/libotr—upgrade to 3.2.1-1 or later
- —upgrade to 3.2.0-2+squeeze1 or later
Is CVE-2012-3461 being exploited?
Low — EPSS is 3.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 3.2.1-1
- from 0, < 3.2.0-2+squeeze1