CVE-2012-3461
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
6.3 Medium
AI Score
Confidence
Low
0.036 Low
EPSS
Percentile
91.7%
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.
Affected configurations
References
bugs.debian.org/cgi-bin/bugreport.cgi?bug=684121
lists.cypherpunks.ca/pipermail/otr-dev/2012-July/001347.html
lists.cypherpunks.ca/pipermail/otr-dev/2012-July/001348.html
lists.opensuse.org/opensuse-security-announce/2012-11/msg00016.html
lists.opensuse.org/opensuse-security-announce/2012-11/msg00019.html
lists.opensuse.org/opensuse-security-announce/2013-01/msg00019.html
otr.git.sourceforge.net/git/gitweb.cgi?p=otr/libotr%3Ba=commitdiff%3Bh=1902baee5d4b056850274ed0fa8c2409f1187435
otr.git.sourceforge.net/git/gitweb.cgi?p=otr/libotr%3Ba=commitdiff%3Bh=6d4ca89cf1d3c9a8aff696c3a846ac5a51f762c1
otr.git.sourceforge.net/git/gitweb.cgi?p=otr/libotr%3Ba=commitdiff%3Bh=b17232f86f8e60d0d22caf9a2400494d3c77da58
www.debian.org/security/2012/dsa-2526
www.mandriva.com/security/advisories?name=MDVSA-2012:131
www.mandriva.com/security/advisories?name=MDVSA-2013:097
www.securityfocus.com/bid/54907
www.ubuntu.com/usn/USN-1541-1
bugzilla.redhat.com/show_bug.cgi?id=846377
exchange.xforce.ibmcloud.com/vulnerabilities/77528
Related
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
6.3 Medium
AI Score
Confidence
Low
0.036 Low
EPSS
Percentile
91.7%