In Irssi before 1.0.3, when receiving a DCC message without source nick/host, it attempts to dereference a NULL pointer. Thus, remote IRC servers can cause a crash.

According to the versions of the irssi package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in Irssi before 1.0.4. When     receiving messages with invalid time stamps, Irssi     would try to dereference a NULL     pointer.(CVE-2017-10965)

  - An issue was discovered in Irssi before 1.0.4. While     updating the internal nick list, Irssi could     incorrectly use the GHashTable interface and free the     nick while updating it. This would then result in     use-after-free conditions on each access of the hash     table.(CVE-2017-10966)

  - In Irssi before 1.0.3, when receiving a DCC message     without source nick/host, it attempts to dereference a     NULL pointer. Thus, remote IRC servers can cause a     crash.(CVE-2017-9468)

  - In Irssi before 1.0.3, when receiving certain     incorrectly quoted DCC files, it tries to find the     terminating quote one byte before the allocated memory.
    Thus, remote attackers might be able to cause a     crash.(CVE-2017-9469)

  - In Irssi before 1.0.6, a calculation error in the     completion code could cause a heap buffer overflow when     completing certain strings.(CVE-2018-5208)

  - Irssi before 0.8.21 allows remote attackers to cause a     denial of service (out-of-bounds read and crash) via a     string containing a formatting sequence (%[) without a     closing bracket (]).(CVE-2017-5356)

  - The nickcmp function in Irssi before 0.8.21 allows     remote attackers to cause a denial of service (NULL     pointer dereference and crash) via a message without a     nick.(CVE-2017-5193)

  - Use-after-free vulnerability in Irssi before 0.8.21     allows remote attackers to cause a denial of service     (crash) via an invalid nick message.(CVE-2017-5194)

  - When the channel topic is set without specifying a     sender, Irssi before 1.0.6 may dereference a NULL     pointer.(CVE-2018-5206)

  - When using an incomplete variable argument, Irssi     before 1.0.6 may access data beyond the end of the     string.(CVE-2018-5207)

  - When using incomplete escape codes, Irssi before 1.0.6     may access data beyond the end of the     string.(CVE-2018-5205)

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

According to the versions of the irssi package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - In Irssi before 1.0.6, a calculation error in the     completion code could cause a heap buffer overflow when     completing certain strings.(CVE-2018-5208)

  - When using incomplete escape codes, Irssi before 1.0.6     may access data beyond the end of the     string.(CVE-2018-5205)

  - When the channel topic is set without specifying a     sender, Irssi before 1.0.6 may dereference a NULL     pointer.(CVE-2018-5206)

  - When using an incomplete variable argument, Irssi     before 1.0.6 may access data beyond the end of the     string.(CVE-2018-5207)

  - The nickcmp function in Irssi before 0.8.21 allows     remote attackers to cause a denial of service (NULL     pointer dereference and crash) via a message without a     nick.(CVE-2017-5193)

  - Use-after-free vulnerability in Irssi before 0.8.21     allows remote attackers to cause a denial of service     (crash) via an invalid nick message.(CVE-2017-5194)

  - Irssi before 0.8.21 allows remote attackers to cause a     denial of service (out-of-bounds read and crash) via a     string containing a formatting sequence (%[) without a     closing bracket (]).(CVE-2017-5356)

  - In Irssi before 1.0.3, when receiving a DCC message     without source nick/host, it attempts to dereference a     NULL pointer. Thus, remote IRC servers can cause a     crash.(CVE-2017-9468)

  - In Irssi before 1.0.3, when receiving certain     incorrectly quoted DCC files, it tries to find the     terminating quote one byte before the allocated memory.
    Thus, remote attackers might be able to cause a     crash.(CVE-2017-9469)

  - An issue was discovered in Irssi before 1.0.4. When     receiving messages with invalid time stamps, Irssi     would try to dereference a NULL     pointer.(CVE-2017-10965)

  - An issue was discovered in Irssi before 1.0.4. While     updating the internal nick list, Irssi could     incorrectly use the GHashTable interface and free the     nick while updating it. This would then result in     use-after-free conditions on each access of the hash     table.(CVE-2017-10966)

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

According to the versions of the irssi package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - The nickcmp function in Irssi before 0.8.21 allows     remote attackers to cause a denial of service (NULL     pointer dereference and crash) via a message without a     nick.(CVE-2017-5193)

  - Use-after-free vulnerability in Irssi before 0.8.21     allows remote attackers to cause a denial of service     (crash) via an invalid nick message.(CVE-2017-5194)

  - Irssi before 0.8.21 allows remote attackers to cause a     denial of service (out-of-bounds read and crash) via a     string containing a formatting sequence (%[) without a     closing bracket (]).(CVE-2017-5356)

  - In Irssi before 1.0.3, when receiving a DCC message     without source nick/host, it attempts to dereference a     NULL pointer. Thus, remote IRC servers can cause a     crash.(CVE-2017-9468)

  - In Irssi before 1.0.3, when receiving certain     incorrectly quoted DCC files, it tries to find the     terminating quote one byte before the allocated memory.
    Thus, remote attackers might be able to cause a     crash.(CVE-2017-9469)

  - An issue was discovered in Irssi before 1.0.4. When     receiving messages with invalid time stamps, Irssi     would try to dereference a NULL     pointer.(CVE-2017-10965)

  - An issue was discovered in Irssi before 1.0.4. While     updating the internal nick list, Irssi could     incorrectly use the GHashTable interface and free the     nick while updating it. This would then result in     use-after-free conditions on each access of the hash     table.(CVE-2017-10966)

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

Irssi has some issues where remote attackers might be able to cause a crash.

CVE-2017-9468

  In irssi, when receiving a DCC message without source nick/host, it   attempts to dereference a NULL pointer.

CVE-2017-9469

  In irssi, when receiving certain incorrectly quoted DCC files, it tries to   find the terminating quote one byte before the allocated memory.

For Debian 7 'Wheezy', these problems have been fixed in version 0.8.15-5+deb7u2.

We recommend that you upgrade your irssi packages.

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

This is an security fix for CVE-2017-9468, CVE-2017-9469.

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

This is new version with security fixes for CVE-2017-9468, CVE-2017-9469.

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

Multiple vulnerabilities have been discovered in Irssi, a terminal based IRC client. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2017-9468     Joseph Bisch discovered that Irssi does not properly     handle DCC messages without source nick/host. A     malicious IRC server can take advantage of this flaw to     cause Irssi to crash, resulting in a denial of service.

  - CVE-2017-9469     Joseph Bisch discovered that Irssi does not properly     handle receiving incorrectly quoted DCC files. A remote     attacker can take advantage of this flaw to cause Irssi     to crash, resulting in a denial of service.

It was discovered that Irssi incorrectly handled certain DCC messages.
A malicious IRC server could use this issue to cause Irssi to crash, resulting in a denial of service. (CVE-2017-9468)

Joseph Bisch discovered that Irssi incorrectly handled receiving incorrectly quoted DCC files. A remote attacker could possibly use this issue to cause Irssi to crash, resulting in a denial of service.
(CVE-2017-9469).

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.

This update to irssi 1.0.3 fixes the following vulnerabilities :

  - CVE-2017-9469: irssi: dcc crash with incorrect quoting     (bsc#1043052)

  - CVE-2017-9468: irssi: dcc message crash without     nick/host (bsc#1043051)

New irssi packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, 14.2, and -current to fix security issues.

Joseph Bisch reports :

When receiving a DCC message without source nick/host, Irssi would attempt to dereference a NULL pointer.

When receiving certain incorrectly quoted DCC files, Irssi would try to find the terminating quote one byte before the allocated memory.

ID	Name	Product	Family	Severity
132130	EulerOS 2.0 SP3 : irssi (EulerOS-SA-2019-2595)	Nessus	Huawei Local Security Checks	critical
131630	EulerOS 2.0 SP2 : irssi (EulerOS-SA-2019-2477)	Nessus	Huawei Local Security Checks	critical
129128	EulerOS 2.0 SP5 : irssi (EulerOS-SA-2019-1971)	Nessus	Huawei Local Security Checks	critical
102926	Debian DLA-1088-1 : irssi security update	Nessus	Debian Local Security Checks	high
101601	Fedora 26 : irssi (2017-2f30e218e7)	Nessus	Fedora Local Security Checks	high
101327	Fedora 25 : irssi (2017-75c571778e)	Nessus	Fedora Local Security Checks	high
100853	Debian DSA-3885-1 : irssi - security update	Nessus	Debian Local Security Checks	high
100755	Ubuntu 14.04 LTS / 16.04 LTS : Irssi vulnerabilities (USN-3317-1)	Nessus	Ubuntu Local Security Checks	high
100713	openSUSE Security Update : irssi (openSUSE-2017-668)	Nessus	SuSE Local Security Checks	high
100703	Slackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / 14.2 / current : irssi (SSA:2017-158-01)	Nessus	Slackware Local Security Checks	high
100674	FreeBSD : irssi -- remote DoS (165e8951-4be0-11e7-a539-0050569f7e80)	Nessus	FreeBSD Local Security Checks	high

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