It was discovered that there was a use-after-free vulnerability in the libical iCalendar library. Remote attackers could cause a denial of service and possibly read heap memory via a specially crafted .ICS file.

For Debian 7 'Wheezy', this issue has been fixed in libical version 0.48-2+deb7u1.

We recommend that you upgrade your libical 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.

According to the version of the libical packages installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - libical allows remote attackers to cause a denial of     service (use-after-free) and possibly read heap memory     via a crafted ics file.(CVE-2016-9584)

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 libical packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - libical allows remote attackers to cause a denial of     service (use-after-free) and possibly read heap memory     via a crafted ics file.(CVE-2016-9584)

  - The icaltime_from_string function in libical 0.47 and     1.0 allows remote attackers to cause a denial of     service (out-of-bounds heap read) via a crafted string     to the icalparser_parse_string function.(CVE-2016-5827)

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.

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.

  - libical: Stack buffer overflow in icalrecur_add_bydayrules in icalrecur.c (CVE-2019-11705)

  - The icalproperty_new_clone function in libical 0.47 and 1.0 allows remote attackers to cause a denial of     service (use-after-free) via a crafted ics file. (CVE-2016-5823)

  - The icalparser_parse_string function in libical 0.47 and 1.0 allows remote attackers to cause a denial of     service (out-of-bounds heap read) via a crafted ics file. (CVE-2016-5825)

  - The parser_get_next_char function in libical 0.47 and 1.0 allows remote attackers to cause a denial of     service (out-of-bounds heap read) by crafting a string to the icalparser_parse_string function.
    (CVE-2016-5826)

  - The icaltime_from_string function in libical 0.47 and 1.0 allows remote attackers to cause a denial of     service (out-of-bounds heap read) via a crafted string to the icalparser_parse_string function.
    (CVE-2016-5827)

  - libical allows remote attackers to cause a denial of service (use-after-free) and possibly read heap     memory via a crafted ics file. (CVE-2016-9584)

  - A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in parser_get_next_char when     processing certain email messages, resulting in a potentially exploitable crash. This vulnerability     affects Thunderbird < 60.7.1. (CVE-2019-11703)

  - A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in     icalmemory_strdup_and_dequote when processing certain email messages, resulting in a potentially     exploitable crash. This vulnerability affects Thunderbird < 60.7.1. (CVE-2019-11704)

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

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

  - The icaltime_from_string function in libical 0.47 and     1.0 allows remote attackers to cause a denial of     service (out-of-bounds heap read) via a crafted string     to the icalparser_parse_string function.(CVE-2016-5827)

  - libical allows remote attackers to cause a denial of     service (use-after-free) and possibly read heap memory     via a crafted ics file.(CVE-2016-9584)

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.

This update for libical fixes the following issues :

Security issues fixed :

  - CVE-2016-5824: libical 1.0 allows remote attackers to     cause a denial of service (use-after-free) via a crafted     ics file. (bsc#986639)

  - CVE-2016-5827: The icaltime_from_string function in     libical 0.47 and 1.0 allows remote attackers to cause a     denial of service (out-of-bounds heap read) via a     crafted string to the icalparser_parse_string function.
    (bsc#986631)

  - CVE-2016-9584: libical allows remote attackers to cause     a denial of service (use-after-free) and possibly read     heap memory via a crafted ics file. (bsc#1015964)

Bug fixes :

  - libical crashes while parsing timezones (bsc#1044995)

This update was imported from the SUSE:SLE-12-SP2:Update update project.

This update for libical fixes the following issues: Security issues fixed :

  - CVE-2016-5824: libical 1.0 allows remote attackers to     cause a denial of service (use-after-free) via a crafted     ics file. (bsc#986639)

  - CVE-2016-5827: The icaltime_from_string function in     libical 0.47 and 1.0 allows remote attackers to cause a     denial of service (out-of-bounds heap read) via a     crafted string to the icalparser_parse_string function.
    (bsc#986631)

  - CVE-2016-9584: libical allows remote attackers to cause     a denial of service (use-after-free) and possibly read     heap memory via a crafted ics file. (bsc#1015964) Bug     fixes :

  - libical crashes while parsing timezones (bsc#1044995)

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

This update for libical fixes the following issues: Security issues fixed :

  - CVE-2016-5823: The icalproperty_new_clone function in     libical 0.47 and 1.0 allows remote attackers to cause a     denial of service (use-after-free) via a crafted ics     file. (bnc#986632)

  - CVE-2016-5824: libical 1.0 allows remote attackers to     cause a denial of service (use-after-free) via a crafted     ics file. (bsc#986639)

  - CVE-2016-5825: The icalparser_parse_string function in     libical 0.47 and 1.0 allows remote attackers to cause a     denial of service (out-of-bounds heap read) via a     crafted ics file. (bsc#986642)

  - CVE-2016-5826: The parser_get_next_char function in     libical 0.47 and 1.0 allows remote attackers to cause a     denial of service (out-of-bounds heap read) by crafting     a string to the icalparser_parse_string function.
    (bsc#986658)

  - CVE-2016-5827: The icaltime_from_string function in     libical 0.47 and 1.0 allows remote attackers to cause a     denial of service (out-of-bounds heap read) via a     crafted string to the icalparser_parse_string function.
    (bsc#986631)

  - CVE-2016-9584: libical allows remote attackers to cause     a denial of service (use-after-free) and possibly read     heap memory via a crafted ics file. (bnc#1015964) Bug     fixes :

  - libical crashes while parsing timezones (bsc#1044995)

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

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.

  - libical: Use-after-free (CVE-2016-9584)

  - The icalproperty_new_clone function in libical 0.47 and 1.0 allows remote attackers to cause a denial of     service (use-after-free) via a crafted ics file. (CVE-2016-5823)

  - The icalparser_parse_string function in libical 0.47 and 1.0 allows remote attackers to cause a denial of     service (out-of-bounds heap read) via a crafted ics file. (CVE-2016-5825)

  - The parser_get_next_char function in libical 0.47 and 1.0 allows remote attackers to cause a denial of     service (out-of-bounds heap read) by crafting a string to the icalparser_parse_string function.
    (CVE-2016-5826)

  - The icaltime_from_string function in libical 0.47 and 1.0 allows remote attackers to cause a denial of     service (out-of-bounds heap read) via a crafted string to the icalparser_parse_string function.
    (CVE-2016-5827)

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

ID	Name	Product	Family	Published	Updated	Severity
100479	Debian DLA-959-1 : libical security update	Nessus	Debian Local Security Checks	5/30/2017	1/11/2021	critical
128838	EulerOS 2.0 SP5 : libical (EulerOS-SA-2019-1915)	Nessus	Huawei Local Security Checks	9/16/2019	4/25/2024	critical
132142	EulerOS 2.0 SP3 : libical (EulerOS-SA-2019-2607)	Nessus	Huawei Local Security Checks	12/18/2019	4/4/2024	critical
195330	RHEL 6 : libical (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	5/11/2024	5/11/2024	critical
131611	EulerOS 2.0 SP2 : libical (EulerOS-SA-2019-2457)	Nessus	Huawei Local Security Checks	12/4/2019	4/8/2024	critical
102058	openSUSE Security Update : libical (openSUSE-2017-869)	Nessus	SuSE Local Security Checks	7/31/2017	1/19/2021	critical
102067	SUSE SLED12 / SLES12 Security Update : libical (SUSE-SU-2017:1989-1)	Nessus	SuSE Local Security Checks	7/31/2017	1/6/2021	critical
106130	SUSE SLES11 Security Update : Recommended update for libical (SUSE-SU-2018:0119-1)	Nessus	SuSE Local Security Checks	1/18/2018	1/19/2021	critical
195335	RHEL 7 : libical (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	5/11/2024	5/11/2024	critical

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