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Overview

Vulnerability Score 4.3 4.3
CVE Id CVE-2012-3461
Last Modified 21 Aug 2013 11:56:31
Published 20 Aug 2012 03:55:05
Confidentiality Impact NONE NONE
Integrity Impact NONE NONE
Availability Impact PARTIAL PARTIAL
Access Vector NETWORK
Access Complexity MEDIUM
Authentication NONE

CVE-2012-3461

Summary

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.

Vulnerable Systems

Application

  • Cypherpunks Libotr 3.1.0

  • Cypherpunks Libotr 3.2.0


References

MISC - https://bugzilla.redhat.com/show_bug.cgi?id=846377

XF - libotr-base64-bo(77528)

BID - 54907

MANDRIVA - MDVSA-2012:131

DEBIAN - DSA-2526

CONFIRM - http://otr.git.sourceforge.net/git/gitweb.cgi?p=otr/libotr;a=commitdiff;h=b17232f86f8e60d0d22caf9a2400494d3c77da58

CONFIRM - http://otr.git.sourceforge.net/git/gitweb.cgi?p=otr/libotr;a=commitdiff;h=6d4ca89cf1d3c9a8aff696c3a846ac5a51f762c1

CONFIRM - http://otr.git.sourceforge.net/git/gitweb.cgi?p=otr/libotr;a=commitdiff;h=1902baee5d4b056850274ed0fa8c2409f1187435

MLIST - [OTR-dev] 20120727 Re: otrl_base64_otr_decode() function...

MLIST - [OTR-dev] 20120727 otrl_base64_otr_decode() function...

MISC - http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=684121

UBUNTU - USN-1541-1

SUSE - SUSE-SU-2012:1578

SUSE - openSUSE-SU-2012:1525

SUSE - openSUSE-SU-2013:0155

MANDRIVA - MDVSA-2013:097

Related Patches

Novell SUSE 2012:7076 libotr security update for SLE 11 SP2 i586

Novell SUSE 2012:7076 libotr security update for SLE 11 SP2 x86_64

Novell SUSE 2012:8377 libotr security update for SLED 10 SP4 i586

Novell SUSE 2012:8377 libotr security update for SLED 10 SP4 x86_64


Last Updated: 27 May 2016 11:01:44