Vulnerability CVE-2011-2943

Vulnerability Name:

CVE-2011-2943 (CCN-69340)

Assigned:

2011-08-22

Published:

2011-08-22

Updated:

2017-09-19

Summary:

The irc_msg_who function in msgs.c in the IRC protocol plugin in libpurple 2.8.0 through 2.9.0 in Pidgin before 2.10.0 does not properly validate characters in nicknames, which allows user-assisted remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted nickname that is not properly handled in a WHO response.
Per: http://cwe.mitre.org/data/definitions/476.html
'CWE-476: NULL Pointer Dereference'

CVSS v3 Severity:

5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Low

CVSS v2 Severity:

4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P)
3.2 Low (Temporal CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P/E:U/RL:OF/RC:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
3.7 Low (CCN Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P/E:U/RL:OF/RC:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

Vulnerability Type:

CWE-Other

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2011-2943

Source: CONFIRM
Type: Patch
http://developer.pidgin.im/viewmtn/revision/diff/5749f9193063800d27bef75c2388f6f9cc2f7f37/with/5c2dba4a7e2e76b76e7f472b88953a4316706d43/libpurple/protocols/irc/msgs.c

Source: CONFIRM
Type: Patch
http://developer.pidgin.im/viewmtn/revision/info/5c2dba4a7e2e76b76e7f472b88953a4316706d43

Source: CCN
Type: Pidgin Security Advisory #53
Remote crash in IRC protocol plugin

Source: CONFIRM
Type: Patch, Vendor Advisory
http://pidgin.im/news/security/?id=53

Source: CCN
Type: SA45663
Pidgin Denial of Service Weaknesses and "file://" Security Issue

Source: SECUNIA
Type: Vendor Advisory
45663

Source: SECUNIA
Type: UNKNOWN
45916

Source: SECTRACK
Type: UNKNOWN
1025961

Source: MLIST
Type: UNKNOWN
[oss-security] 20110820 CVE request: Pidgin crash

Source: MLIST
Type: UNKNOWN
[oss-security] 20110822 Re: CVE request: Pidgin crash

Source: CCN
Type: OSVDB ID: 74825
Pidgin libpurple IRC Protocol Plugin msgs.c irc_msg_who Function WHO Response DoS

Source: BID
Type: UNKNOWN
49268

Source: CCN
Type: BID-49268
Pidgin Denial of Service and Security Bypass Vulnerabilities

Source: CONFIRM
Type: UNKNOWN
https://bugzilla.redhat.com/show_bug.cgi?id=722939

Source: XF
Type: UNKNOWN
pidgin-irc-protocol-dos(69340)

Source: XF
Type: UNKNOWN
pidgin-irc-protocol-dos(69340)

Source: OVAL
Type: UNKNOWN
oval:org.mitre.oval:def:18005

Vulnerable Configuration:

Configuration 1:

cpe:/a:pidgin:libpurple:2.8.0:*:*:*:*:*:*:*

OR cpe:/a:pidgin:libpurple:2.9.0:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.0.0:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.0.1:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.0.2:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.1.0:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.1.1:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.2.0:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.2.1:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.2.2:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.3.0:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.3.1:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.4.0:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.4.1:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.4.2:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.4.3:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.5.0:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.5.1:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.5.2:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.5.3:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.5.4:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.5.5:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.5.6:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.5.7:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.5.8:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.5.9:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.6.0:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.6.1:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.6.2:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.6.4:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.6.5:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.6.6:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.7.0:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.7.1:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.7.2:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.7.3:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.7.4:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.7.5:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.7.6:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.7.7:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.7.8:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.7.9:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.7.10:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.7.11:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:2.8.0:*:*:*:*:*:*:*

OR cpe:/a:pidgin:pidgin:*:*:*:*:*:*:*:* (Version <= 2.9.0)

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.mitre.oval:def:18005	V	The irc_msg_who function in msgs.c in the IRC protocol plugin in libpurple 2.8.0 through 2.9.0 in Pidgin before 2.10.0 does not properly validate characters in nicknames, which allows user-assisted remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted nickname that is not properly handled in a WHO response	2013-09-30

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