Exempi up to 2.4.2 PS File PostScript_Support.cpp ConvertToDate null pointer dereference

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

Summaryinfo

A vulnerability classified as problematic has been found in Exempi up to 2.4.2. The affected element is the function PostScript_Support::ConvertToDate of the file XMPFiles/source/FormatSupport/PostScript_Support.cpp of the component PS File Handler. The manipulation leads to null pointer dereference. This vulnerability is traded as CVE-2017-18237. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Exempi up to 2.4.2. It has been rated as problematic. This issue affects the function PostScript_Support::ConvertToDate of the file XMPFiles/source/FormatSupport/PostScript_Support.cpp of the component PS File Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

An issue was discovered in Exempi before 2.4.3. The PostScript_Support::ConvertToDate function in XMPFiles/source/FormatSupport/PostScript_Support.cpp allows remote attackers to cause a denial of service (invalid pointer dereference and application crash) via a crafted .ps file.

The bug was discovered 07/25/2017. The weakness was shared 03/15/2018 (Website). It is possible to read the advisory at bugs.freedesktop.org. The identification of this vulnerability is CVE-2017-18237 since 03/15/2018. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 233 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 108839 (Fedora 27 : exempi (2018-c442aad4dc)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 277698 (Fedora Security Update for exempi (FEDORA-2018-c442aad4dc)).

Upgrading to version 2.4.3 eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (108839). The entries VDB-114149, VDB-114150, VDB-114151 and VDB-114152 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

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: Null pointer dereference
CWE: CWE-476 / CWE-404
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: 108839
Nessus Name: Fedora 27 : exempi (2018-c442aad4dc)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 861012
OpenVAS Name: Fedora Update for exempi FEDORA-2018-c442aad4dc
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Exempi 2.4.3
Patch: cgit.freedesktop.org

Timelineinfo

07/25/2017 🔍
03/15/2018 +233 days 🔍
03/15/2018 +0 days 🔍
03/15/2018 +0 days 🔍
03/16/2018 +1 days 🔍
04/04/2018 +19 days 🔍
04/05/2018 +1 days 🔍
02/22/2023 +1784 days 🔍

Sourcesinfo

Advisory: FEDORA-2018-c442aad4dc
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-18237 (🔍)
GCVE (CVE): GCVE-0-2017-18237
GCVE (VulDB): GCVE-100-114659
See also: 🔍

Entryinfo

Created: 03/16/2018 08:07
Updated: 02/22/2023 08:35
Changes: 03/16/2018 08:07 (75), 01/14/2020 09:15 (3), 02/22/2023 08:34 (4), 02/22/2023 08:35 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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