Vulnerabilities > CVE-2018-5207 - Use of Externally-Controlled Format String vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
NONE Availability impact
NONE Summary
When using an incomplete variable argument, Irssi before 1.0.6 may access data beyond the end of the string.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Format String Injection An attacker includes formatting characters in a string input field on the target application. Most applications assume that users will provide static text and may respond unpredictably to the presence of formatting character. For example, in certain functions of the C programming languages such as printf, the formatting character %s will print the contents of a memory location expecting this location to identify a string and the formatting character %n prints the number of DWORD written in the memory. An attacker can use this to read or write to memory locations or files, or simply to manipulate the value of the resulting text in unexpected ways. Reading or writing memory may result in program crashes and writing memory could result in the execution of arbitrary code if the attacker can write to the program stack.
- String Format Overflow in syslog() This attack targets the format string vulnerabilities in the syslog() function. An attacker would typically inject malicious input in the format string parameter of the syslog function. This is a common problem, and many public vulnerabilities and associated exploits have been posted.
Nessus
NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_A3764767F31E11E795F2005056925DB4.NASL description Irssi reports : When the channel topic is set without specifying a sender, Irssi may dereference NULL pointer. Found by Joseph Bisch. When using incomplete escape codes, Irssi may access data beyond the end of the string. Found by Joseph Bisch. A calculation error in the completion code could cause a heap buffer overflow when completing certain strings. Found by Joseph Bisch. When using an incomplete variable argument, Irssi may access data beyond the end of the string. Found by Joseph Bisch. last seen 2020-06-01 modified 2020-06-02 plugin id 105626 published 2018-01-08 reporter This script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/105626 title FreeBSD : irssi -- multiple vulnerabilities (a3764767-f31e-11e7-95f2-005056925db4) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from the FreeBSD VuXML database : # # Copyright 2003-2018 Jacques Vidrine and contributors # # Redistribution and use in source (VuXML) and 'compiled' forms (SGML, # HTML, PDF, PostScript, RTF and so forth) with or without modification, # are permitted provided that the following conditions are met: # 1. Redistributions of source code (VuXML) must retain the above # copyright notice, this list of conditions and the following # disclaimer as the first lines of this file unmodified. # 2. Redistributions in compiled form (transformed to other DTDs, # published online in any format, converted to PDF, PostScript, # RTF and other formats) must reproduce the above copyright # notice, this list of conditions and the following disclaimer # in the documentation and/or other materials provided with the # distribution. # # THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, # OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT # OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR # BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, # WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE # OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION, # EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. # include("compat.inc"); if (description) { script_id(105626); script_version("3.3"); script_cvs_date("Date: 2018/11/10 11:49:47"); script_cve_id("CVE-2018-5205", "CVE-2018-5206", "CVE-2018-5207", "CVE-2018-5208"); script_name(english:"FreeBSD : irssi -- multiple vulnerabilities (a3764767-f31e-11e7-95f2-005056925db4)"); script_summary(english:"Checks for updated package in pkg_info output"); script_set_attribute( attribute:"synopsis", value:"The remote FreeBSD host is missing a security-related update." ); script_set_attribute( attribute:"description", value: "Irssi reports : When the channel topic is set without specifying a sender, Irssi may dereference NULL pointer. Found by Joseph Bisch. When using incomplete escape codes, Irssi may access data beyond the end of the string. Found by Joseph Bisch. A calculation error in the completion code could cause a heap buffer overflow when completing certain strings. Found by Joseph Bisch. When using an incomplete variable argument, Irssi may access data beyond the end of the string. Found by Joseph Bisch." ); script_set_attribute( attribute:"see_also", value:"https://irssi.org/security/irssi_sa_2018_01.txt" ); script_set_attribute( attribute:"see_also", value:"https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224954" ); # https://vuxml.freebsd.org/freebsd/a3764767-f31e-11e7-95f2-005056925db4.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?3a8ac75d" ); script_set_attribute(attribute:"solution", value:"Update the affected package."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:irssi"); script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd"); script_set_attribute(attribute:"vuln_publication_date", value:"2018/01/03"); script_set_attribute(attribute:"patch_publication_date", value:"2018/01/06"); script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/08"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"FreeBSD Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info"); exit(0); } include("audit.inc"); include("freebsd_package.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD"); if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING); flag = 0; if (pkg_test(save_report:TRUE, pkg:"irssi<1.0.6,1")) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:pkg_report_get()); else security_hole(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");
NASL family SuSE Local Security Checks NASL id OPENSUSE-2018-18.NASL description This update for irssi to version 1.0.6 fixes several issues that may affect the stability of irssi : - CVE-2018-5205: Data access beyond the end of the string when using incomplete escape codes - CVE-2018-5206: NULL pointer dereference when the channel topic is set without specifying a sender - CVE-2018-5207: When using an incomplete variable argument, Irssi may access data beyond the end of the string - CVE-2018-5208: Heap buffer overflow when completing certain strings last seen 2020-06-05 modified 2018-01-10 plugin id 105716 published 2018-01-10 reporter This script is Copyright (C) 2018-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/105716 title openSUSE Security Update : irssi (openSUSE-2018-18) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from openSUSE Security Update openSUSE-2018-18. # # The text description of this plugin is (C) SUSE LLC. # include("compat.inc"); if (description) { script_id(105716); script_version("3.3"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04"); script_cve_id("CVE-2018-5205", "CVE-2018-5206", "CVE-2018-5207", "CVE-2018-5208"); script_name(english:"openSUSE Security Update : irssi (openSUSE-2018-18)"); script_summary(english:"Check for the openSUSE-2018-18 patch"); script_set_attribute( attribute:"synopsis", value:"The remote openSUSE host is missing a security update." ); script_set_attribute( attribute:"description", value: "This update for irssi to version 1.0.6 fixes several issues that may affect the stability of irssi : - CVE-2018-5205: Data access beyond the end of the string when using incomplete escape codes - CVE-2018-5206: NULL pointer dereference when the channel topic is set without specifying a sender - CVE-2018-5207: When using an incomplete variable argument, Irssi may access data beyond the end of the string - CVE-2018-5208: Heap buffer overflow when completing certain strings" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1074958" ); script_set_attribute( attribute:"solution", value:"Update the affected irssi packages." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:irssi"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:irssi-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:irssi-debugsource"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:irssi-devel"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:42.2"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:42.3"); script_set_attribute(attribute:"patch_publication_date", value:"2018/01/09"); script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/10"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2018-2020 Tenable Network Security, Inc."); script_family(english:"SuSE Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/SuSE/release"); if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE"); if (release !~ "^(SUSE42\.2|SUSE42\.3)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "42.2 / 42.3", release); if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); ourarch = get_kb_item("Host/cpu"); if (!ourarch) audit(AUDIT_UNKNOWN_ARCH); if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch); flag = 0; if ( rpm_check(release:"SUSE42.2", reference:"irssi-1.0.6-14.18.1") ) flag++; if ( rpm_check(release:"SUSE42.2", reference:"irssi-debuginfo-1.0.6-14.18.1") ) flag++; if ( rpm_check(release:"SUSE42.2", reference:"irssi-debugsource-1.0.6-14.18.1") ) flag++; if ( rpm_check(release:"SUSE42.2", reference:"irssi-devel-1.0.6-14.18.1") ) flag++; if ( rpm_check(release:"SUSE42.3", reference:"irssi-1.0.6-21.1") ) flag++; if ( rpm_check(release:"SUSE42.3", reference:"irssi-debuginfo-1.0.6-21.1") ) flag++; if ( rpm_check(release:"SUSE42.3", reference:"irssi-debugsource-1.0.6-21.1") ) flag++; if ( rpm_check(release:"SUSE42.3", reference:"irssi-devel-1.0.6-21.1") ) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get()); else security_hole(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "irssi / irssi-debuginfo / irssi-debugsource / irssi-devel"); }
NASL family Debian Local Security Checks NASL id DEBIAN_DSA-4162.NASL description Multiple vulnerabilities have been discovered in Irssi, a terminal-based IRC client which can result in denial of service. last seen 2020-06-01 modified 2020-06-02 plugin id 108774 published 2018-04-02 reporter This script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/108774 title Debian DSA-4162-1 : irssi - security update NASL family Fedora Local Security Checks NASL id FEDORA_2018-C4E4935E01.NASL description This is new version of irssi. It contains security fixes for CVE-2018-5205 CVE-2018-5206 CVE-2018-5207 CVE-2018-5208 . 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. last seen 2020-06-05 modified 2018-01-18 plugin id 106112 published 2018-01-18 reporter This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/106112 title Fedora 27 : irssi (2018-c4e4935e01) NASL family Fedora Local Security Checks NASL id FEDORA_2018-BC08435961.NASL description This is new version of irssi. It contains security fixes for CVE-2018-5205 CVE-2018-5206 CVE-2018-5207 CVE-2018-5208. 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. last seen 2020-06-05 modified 2018-01-18 plugin id 106111 published 2018-01-18 reporter This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/106111 title Fedora 26 : irssi (2018-bc08435961) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3527-1.NASL description Joseph Bisch discovered that Irssi incorrectly handled incomplete escape codes. If a user were tricked into using malformed commands or opening malformed files, an attacker could use this issue to cause Irssi to crash, resulting in a denial of service. (CVE-2018-5205) Joseph Bisch discovered that Irssi incorrectly handled settings the channel topic without specifying a sender. A malicious IRC server could use this issue to cause Irssi to crash, resulting in a denial of service. (CVE-2018-5206) Joseph Bisch discovered that Irssi incorrectly handled incomplete variable arguments. If a user were tricked into using malformed commands or opening malformed files, an attacker could use this issue to cause Irssi to crash, resulting in a denial of service. (CVE-2018-5207) Joseph Bisch discovered that Irssi incorrectly handled completing certain strings. An attacker could use this issue to cause Irssi to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-5208). 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. last seen 2020-06-01 modified 2020-06-02 plugin id 105750 published 2018-01-11 reporter Ubuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/105750 title Ubuntu 14.04 LTS / 16.04 LTS / 17.04 / 17.10 : irssi vulnerabilities (USN-3527-1) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-2477.NASL description 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. last seen 2020-05-08 modified 2019-12-04 plugin id 131630 published 2019-12-04 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/131630 title EulerOS 2.0 SP2 : irssi (EulerOS-SA-2019-2477) NASL family Slackware Local Security Checks NASL id SLACKWARE_SSA_2018-008-01.NASL description New irssi packages are available for Slackware 14.0, 14.1, 14.2, and -current to fix security issues. last seen 2020-06-01 modified 2020-06-02 plugin id 105656 published 2018-01-09 reporter This script is Copyright (C) 2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/105656 title Slackware 14.0 / 14.1 / 14.2 / current : irssi (SSA:2018-008-01) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-2595.NASL description 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. last seen 2020-05-08 modified 2019-12-18 plugin id 132130 published 2019-12-18 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/132130 title EulerOS 2.0 SP3 : irssi (EulerOS-SA-2019-2595) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-2161.NASL description According to the versions of the irssi package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - When using an incomplete variable argument, Irssi before 1.0.6 may access data beyond the end of the string.(CVE-2018-5207) - 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 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. last seen 2020-05-08 modified 2019-11-12 plugin id 130870 published 2019-11-12 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130870 title EulerOS 2.0 SP5 : irssi (EulerOS-SA-2019-2161)