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.

The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - irssi: heap buffer overflow due to calculation error in the completion code (CVE-2018-5208)

  - The buf.pl script before 2.20 in Irssi before 0.8.20 uses weak permissions for the scrollbuffer dump file     created between upgrades, which might allow local users to obtain sensitive information from private chat     conversations by reading the file. (CVE-2016-7553)

  - 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)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

The remote Redhat Enterprise Linux 6 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - irssi: heap buffer overflow due to calculation error in the completion code (CVE-2018-5208)

  - The buf.pl script before 2.20 in Irssi before 0.8.20 uses weak permissions for the scrollbuffer dump file     created between upgrades, which might allow local users to obtain sensitive information from private chat     conversations by reading the file. (CVE-2016-7553)

  - 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)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

This plugin has been deprecated as it does not adhere to established standards for this style of check.

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.

Multiple vulnerabilities have been discovered in Irssi, a terminal based IRC client, which may lead to denial of service or other unspecified impact.

For Debian 7 'Wheezy', these problems have been fixed in version 0.8.15-5+deb7u4.

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.

The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3184-1 advisory.

    It was discovered that the Irssi buf.pl script set incorrect permissions. A local attacker could use this     issue to retrieve another user's window contents. (CVE-2016-7553)

    Joseph Bisch discovered that Irssi incorrectly handled comparing nicks. A remote attacker could use this     issue to cause Irssi to crash, resulting in a denial of service, or possibly execute arbitrary code.
    (CVE-2017-5193)

    It was discovered that Irssi incorrectly handled invalid nick messages. A remote attacker could use this     issue to cause Irssi to crash, resulting in a denial of service, or possibly execute arbitrary code.
    (CVE-2017-5194)

    Joseph Bisch discovered that Irssi incorrectly handled certain incomplete control codes. A remote attacker     could use this issue to cause Irssi to crash, resulting in a denial of service, or possibly execute     arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2017-5195)

    Hanno Bck and Joseph Bisch discovered that Irssi incorrectly handled certain incomplete character     sequences. A remote attacker could use this issue to cause Irssi to crash, resulting in a denial of     service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2017-5196)

    Hanno Bck discovered that Irssi incorrectly handled certain format strings. A remote attacker could use     this issue to cause Irssi to crash, resulting in a denial of service. (CVE-2017-5356)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

This is an security update fixing CVE-2017-5193, CVE-2017-5194, CVE-2017-5195, CVE-2017-5196, CVE-2017-5356.

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.

The remote host is affected by the vulnerability described in GLSA-201701-45 (irssi: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in irssi. Please review       the CVE identifiers referenced below for details.
  Impact :

    A remote attacker could possibly execute arbitrary code with the       privileges of the process or cause a Denial of Service condition.
  Workaround :

    There is no known workaround at this time.

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.

irssi was updated to fix four vulnerabilities that could result in denial of service (remote crash) when connecting to malicious servers or receiving specially crafted data. (boo#1018357)

  - CVE-2017-5193: NULL pointer dereference in the nickcmp     function

  - CVE-2017-5194: out of bounds read in certain incomplete     control codes

  - CVE-2017-5195: out of bounds read in certain incomplete     character sequences 

  - CVE-2017-5196: Correct an error when receiving invalid     nick message

Irssi reports :

Five vulnerabilities have been located in Irssi

- A NULL pointer dereference in the nickcmp function found by Joseph Bisch. (CWE-690)

- Use after free when receiving invalid nick message (Issue #466, CWE-146)

- Out of bounds read in certain incomplete control codes found by Joseph Bisch. (CWE-126)

- Out of bounds read in certain incomplete character sequences found by Hanno Bock and independently by J. Bisch. (CWE-126)

- Out of bounds read when Printing the value '%['. Found by Hanno Bock. (CWE-126)

These issues may result in denial of service (remote crash).

ID	Name	Product	Family	Severity
198976	RHEL 7 : irssi (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	critical
198925	RHEL 6 : irssi (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	critical
196853	RHEL 6 : irssi (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	critical
196841	RHEL 7 : irssi (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	critical
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
105424	Debian DLA-1217-1 : irssi security update	Nessus	Debian Local Security Checks	high
96953	Ubuntu 14.04 LTS / 16.04 LTS : Irssi vulnerabilities (USN-3184-1)	Nessus	Ubuntu Local Security Checks	low
96898	Fedora 24 : irssi (2017-d2e7217e2a)	Nessus	Fedora Local Security Checks	high
96893	Fedora 25 : irssi (2017-7f9e997585)	Nessus	Fedora Local Security Checks	high
96642	GLSA-201701-45 : irssi: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	high
96409	Slackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / 14.2 / current : irssi (SSA:2017-011-03)	Nessus	Slackware Local Security Checks	high
96385	openSUSE Security Update : irssi (openSUSE-2017-67)	Nessus	SuSE Local Security Checks	high
96322	FreeBSD : Irssi -- multiple vulnerabilities (3d6be69b-d365-11e6-a071-001e67f15f5a)	Nessus	FreeBSD Local Security Checks	high

Detections

Analytics

CVE-2017-5194

high

Tenable Plugins

critical

critical

critical

critical

critical

critical

critical

high

low

high

high

high

high

high

high