Public Date:
846377: CVE-2012-3461 libotr: Multiple heap-based buffer overflows in the Base64 decoder

The MITRE CVE dictionary describes this issue as:

The (1) otrl_base64_otr_decode function in src/b64.c&#59; (2) otrl_proto_data_read_flags and (3) otrl_proto_accept_data functions in src/proto.c&#59; 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.

Find out more about CVE-2012-3461 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 6.8
Base Metrics AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).