Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cypherpunks | Libotr | <= 3.2.0 |
Related Weaknesses (CWE)
References
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=684121
- http://lists.cypherpunks.ca/pipermail/otr-dev/2012-July/001347.html
- http://lists.cypherpunks.ca/pipermail/otr-dev/2012-July/001348.html
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00016.html
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00019.html
- http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00019.html
- http://otr.git.sourceforge.net/git/gitweb.cgi?p=otr/libotr%3Ba=commitdiff%3Bh=19
- http://otr.git.sourceforge.net/git/gitweb.cgi?p=otr/libotr%3Ba=commitdiff%3Bh=6d
- http://otr.git.sourceforge.net/git/gitweb.cgi?p=otr/libotr%3Ba=commitdiff%3Bh=b1
- http://www.debian.org/security/2012/dsa-2526
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:131
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:097
- http://www.securityfocus.com/bid/54907
- http://www.ubuntu.com/usn/USN-1541-1
- https://bugzilla.redhat.com/show_bug.cgi?id=846377
FAQ
What is CVE-2012-3461?
CVE-2012-3461 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 befor...
How severe is CVE-2012-3461?
CVE-2012-3461 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2012-3461?
Check the references section above for vendor advisories and patch information. Affected products include: Cypherpunks Libotr.