libical 0.47/1.0 ICS File icalproperty_new_clone use after free

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in libical 0.47/1.0 and classified as problematic. This issue affects the function icalproperty_new_clone of the component ICS File Handler. Executing a manipulation can lead to use after free. This vulnerability is registered as CVE-2016-5823. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in libical 0.47/1.0. It has been declared as problematic. This vulnerability affects the function icalproperty_new_clone of the component ICS File Handler. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect availability. CVE summarizes:

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.

The bug was discovered 06/25/2016. The weakness was published 01/27/2017 (Website). The advisory is shared for download at openwall.com. This vulnerability was named CVE-2016-5823 since 06/23/2016. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 216 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 106130 (SUSE SLES11 Security Update : Recommended update for libical (SUSE-SU-2018:0119-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170690 (SUSE Enterprise Linux Security Update for libical (SUSE-SU-2018:0119-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 years after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (106130). Similar entries are available at VDB-96101, VDB-96102, VDB-96103 and VDB-96104. Once again VulDB remains the best source for vulnerability data.

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 106130
Nessus Name: SUSE SLES11 Security Update : Recommended update for libical (SUSE-SU-2018:0119-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

06/23/2016 🔍
06/25/2016 +2 days 🔍
01/27/2017 +216 days 🔍
01/27/2017 +0 days 🔍
01/28/2017 +1 days 🔍
01/17/2018 +354 days 🔍
01/18/2018 +1 days 🔍
05/15/2026 +3038 days 🔍

Sourcesinfo

Advisory: openwall.com
Status: Confirmed

CVE: CVE-2016-5823 (🔍)
GCVE (CVE): GCVE-0-2016-5823
GCVE (VulDB): GCVE-100-96100
OSVDB: - CVE-2016-5823 - libical - Use-After-Free Issue

See also: 🔍

Entryinfo

Created: 01/28/2017 09:09
Updated: 05/15/2026 01:59
Changes: 01/28/2017 09:09 (67), 08/04/2020 21:04 (5), 05/15/2026 01:59 (20)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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