libymsg.c in the Yahoo! protocol plugin in libpurple in Pidgin 2.6.0 through 2.7.10 allows (1) remote authenticated users to cause a denial of service (NULL pointer dereference and application crash) via a malformed YMSG notification packet, and allows (2) remote Yahoo! servers to cause a denial of service (NULL pointer dereference and application crash) via a malformed YMSG SMS message.

The remote Oracle Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2011-0616 advisory.

  - libymsg.c in the Yahoo! protocol plugin in libpurple in Pidgin 2.6.0 through 2.7.10 allows (1) remote     authenticated users to cause a denial of service (NULL pointer dereference and application crash) via a     malformed YMSG notification packet, and allows (2) remote Yahoo! servers to cause a denial of service     (NULL pointer dereference and application crash) via a malformed YMSG SMS message. (CVE-2011-1091)

  - cipher.c in the Cipher API in libpurple in Pidgin before 2.7.10 retains encryption-key data in process     memory, which might allow local users to obtain sensitive information by reading a core file or other     representation of memory contents. (CVE-2011-4922)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Remote users could crash pidgin via ICQ, SILC, XMPP and Yahoo protocols (CVE-2011-4601, CVE-2011-4603, CVE-2011-4602, CVE-2011-1091).

From Red Hat Security Advisory 2011:1371 :

Updated pidgin packages that fix multiple security issues are now available for Red Hat Enterprise Linux 4 and 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Pidgin is an instant messaging program which can log in to multiple accounts on multiple instant messaging networks simultaneously.

An input sanitization flaw was found in the way the Pidgin SILC (Secure Internet Live Conferencing) protocol plug-in escaped certain UTF-8 characters. A remote attacker could use this flaw to crash Pidgin via a specially crafted SILC message. (CVE-2011-3594)

Multiple NULL pointer dereference flaws were found in the way the Pidgin Yahoo! Messenger Protocol plug-in handled malformed YMSG packets. A remote attacker could use these flaws to crash Pidgin via a specially crafted notification message. (CVE-2011-1091)

Red Hat would like to thank the Pidgin project for reporting CVE-2011-1091. Upstream acknowledges Marius Wachtler as the original reporter of CVE-2011-1091.

All Pidgin users should upgrade to these updated packages, which contain backported patches to resolve these issues. Pidgin must be restarted for this update to take effect.

Pidgin is an instant messaging program which can log in to multiple accounts on multiple instant messaging networks simultaneously.

An input sanitization flaw was found in the way the Pidgin SILC (Secure Internet Live Conferencing) protocol plug-in escaped certain UTF-8 characters. A remote attacker could use this flaw to crash Pidgin via a specially crafted SILC message. (CVE-2011-3594)

Multiple NULL pointer dereference flaws were found in the way the Pidgin Yahoo! Messenger Protocol plug-in handled malformed YMSG packets. A remote attacker could use these flaws to crash Pidgin via a specially crafted notification message. (CVE-2011-1091)

All Pidgin users should upgrade to these updated packages, which contain backported patches to resolve these issues. Pidgin must be restarted for this update to take effect.

Pidgin is an instant messaging program which can log in to multiple accounts on multiple instant messaging networks simultaneously.

Multiple NULL pointer dereference flaws were found in the way the Pidgin Yahoo! Messenger Protocol plug-in handled malformed YMSG packets. A remote attacker could use these flaws to crash Pidgin via a specially crafted notification message. (CVE-2011-1091)

Red Hat would like to thank the Pidgin project for reporting these issues. Upstream acknowledges Marius Wachtler as the original reporter.

This update also fixes the following bugs :

  - Previous versions of the pidgin package did not properly     clear certain data structures used in libpurple/cipher.c     when attempting to free them. Partial information could     potentially be extracted from the incorrectly cleared     regions of the previously freed memory. With this     update, data structures are properly cleared when freed.
    (BZ#684685)

  - This erratum upgrades Pidgin to upstream version 2.7.9.
    For a list of all changes addressed in this upgrade,     refer to http://developer.pidgin.im/wiki/ChangeLog     (BZ#616917)

  - Some incomplete translations for the kn_IN and ta_IN     locales have been corrected. (BZ#633860, BZ#640170)

Users of pidgin should upgrade to these updated packages, which resolve these issues. Pidgin must be restarted for this update to take effect.

Remote users could have crashed crash pidgin via ICQ, SILC, XMPP and Yahoo protocols (CVE-2011-4601 / CVE-2011-4603 / CVE-2011-4602 / CVE-2011-1091). This has been fixed.

Remote users could have crashed pidgin via ICQ, SILC, XMPP and Yahoo protocols (CVE-2011-4601 / CVE-2011-4603 / CVE-2011-4602 / CVE-2011-1091). This has been fixed.

Marius Wachtler discovered that Pidgin incorrectly handled malformed YMSG messages in the Yahoo! protocol handler. A remote attacker could send a specially crafted message and cause Pidgin to crash, leading to a denial of service. This issue only affected Ubuntu 10.04 LTS and 10.10. (CVE-2011-1091)

Marius Wachtler discovered that Pidgin incorrectly handled HTTP 100 responses in the MSN protocol handler. A remote attacker could send a specially crafted message and cause Pidgin to crash, leading to a denial of service. (CVE-2011-3184)

Diego Bauche Madero discovered that Pidgin incorrectly handled UTF-8 sequences in the SILC protocol handler. A remote attacker could send a specially crafted message and cause Pidgin to crash, leading to a denial of service. (CVE-2011-3594).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Updated pidgin packages that fix multiple security issues are now available for Red Hat Enterprise Linux 4 and 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Pidgin is an instant messaging program which can log in to multiple accounts on multiple instant messaging networks simultaneously.

An input sanitization flaw was found in the way the Pidgin SILC (Secure Internet Live Conferencing) protocol plug-in escaped certain UTF-8 characters. A remote attacker could use this flaw to crash Pidgin via a specially crafted SILC message. (CVE-2011-3594)

Multiple NULL pointer dereference flaws were found in the way the Pidgin Yahoo! Messenger Protocol plug-in handled malformed YMSG packets. A remote attacker could use these flaws to crash Pidgin via a specially crafted notification message. (CVE-2011-1091)

Red Hat would like to thank the Pidgin project for reporting CVE-2011-1091. Upstream acknowledges Marius Wachtler as the original reporter of CVE-2011-1091.

All Pidgin users should upgrade to these updated packages, which contain backported patches to resolve these issues. Pidgin must be restarted for this update to take effect.

The remote Redhat Enterprise Linux 4 / 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2011:1371 advisory.

  - Pidgin: Multiple NULL pointer dereference flaws in Yahoo protocol plug-in (CVE-2011-1091)

  - libpurple: invalid UTF-8 string handling in SILC messages (CVE-2011-3594)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Updated pidgin packages that fix multiple security issues and various bugs are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having low security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

Pidgin is an instant messaging program which can log in to multiple accounts on multiple instant messaging networks simultaneously.

Multiple NULL pointer dereference flaws were found in the way the Pidgin Yahoo! Messenger Protocol plug-in handled malformed YMSG packets. A remote attacker could use these flaws to crash Pidgin via a specially crafted notification message. (CVE-2011-1091)

Red Hat would like to thank the Pidgin project for reporting these issues. Upstream acknowledges Marius Wachtler as the original reporter.

This update also fixes the following bugs :

* Previous versions of the pidgin package did not properly clear certain data structures used in libpurple/cipher.c when attempting to free them. Partial information could potentially be extracted from the incorrectly cleared regions of the previously freed memory. With this update, data structures are properly cleared when freed. (BZ#684685)

* This erratum upgrades Pidgin to upstream version 2.7.9. For a list of all changes addressed in this upgrade, refer to http://developer.pidgin.im/wiki/ChangeLog (BZ#616917)

* Some incomplete translations for the kn_IN and ta_IN locales have been corrected. (BZ#633860, BZ#640170)

Users of pidgin should upgrade to these updated packages, which resolve these issues. Pidgin must be restarted for this update to take effect.

Multiple vulnerabilities has been identified and fixed in pidgin :

It was discovered that libpurple versions prior to 2.7.10 do not properly clear certain data structures used in libpurple/cipher.c prior to freeing. An attacker could potentially extract partial information from memory regions freed by libpurple.

The Yahoo protocol plugin in libpurple versions 2.6.0 through 2.7.10 do not properly handle malformed YMSG packets, leading to NULL pointer dereferences and application crash (CVE-2011-1091).

Packages for 2009.0 are provided as of the Extended Maintenance Program. Please visit this link to learn more:
http://store.mandriva.com/product_info.php?cPath=149 products_id=490

This update provides pidgin 2.7.11, which is not vulnerable to these issues.

New release 2.7.11

Full Upstream ChangeLog :

http://developer.pidgin.im/wiki/ChangeLog

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

New pidgin packages are available for Slackware 12.0, 12.1, 12.2, 13.0, 13.1, and -current to fix security issues.

ID	Name	Product	Family	Severity
181064	Oracle Linux 6 : pidgin (ELSA-2011-0616)	Nessus	Oracle Linux Local Security Checks	high
75830	openSUSE Security Update : finch (openSUSE-SU-2012:0066-1)	Nessus	SuSE Local Security Checks	medium
75490	openSUSE Security Update : finch (openSUSE-SU-2012:0066-1)	Nessus	SuSE Local Security Checks	medium
68369	Oracle Linux 4 : pidgin (ELSA-2011-1371)	Nessus	Oracle Linux Local Security Checks	medium
61153	Scientific Linux Security Update : pidgin on SL4.x, SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	medium
61045	Scientific Linux Security Update : pidgin on SL6.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	medium
57466	SuSE 10 Security Update : pidgin (ZYPP Patch Number 7901)	Nessus	SuSE Local Security Checks	medium
57465	SuSE 11.1 Security Update : pidgin (SAT Patch Number 5586)	Nessus	SuSE Local Security Checks	medium
56915	Ubuntu 10.04 LTS / 10.10 / 11.04 : pidgin vulnerabilities (USN-1273-1)	Nessus	Ubuntu Local Security Checks	medium
56514	CentOS 4 / 5 : pidgin (CESA-2011:1371)	Nessus	CentOS Local Security Checks	medium
56505	RHEL 4 / 5 : pidgin (RHSA-2011:1371)	Nessus	Red Hat Local Security Checks	high
54598	RHEL 6 : pidgin (RHSA-2011:0616)	Nessus	Red Hat Local Security Checks	medium
52748	Mandriva Linux Security Advisory : pidgin (MDVSA-2011:050)	Nessus	Mandriva Local Security Checks	medium
52725	Fedora 15 : pidgin-2.7.11-1.fc15 (2011-3150)	Nessus	Fedora Local Security Checks	medium
52724	Fedora 13 : pidgin-2.7.11-1.fc13 (2011-3132)	Nessus	Fedora Local Security Checks	medium
52665	Fedora 14 : pidgin-2.7.11-1.fc14 (2011-3113)	Nessus	Fedora Local Security Checks	medium
52636	Slackware 12.0 / 12.1 / 12.2 / 13.0 / 13.1 / current : pidgin (SSA:2011-070-02)	Nessus	Slackware Local Security Checks	medium

Detections

Analytics

CVE-2011-1091

medium

Tenable Plugins

high

medium

medium

medium

medium

medium

medium

medium

medium

medium

high

medium

medium

medium

medium

medium

medium