libxls 1.4.0 ole.c read_MSAT double free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in libxls 1.4.0. This issue affects the function read_MSAT of the file ole.c. This manipulation causes double free. This vulnerability is tracked as CVE-2018-20450. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in libxls 1.4.0 and classified as problematic. Affected by this vulnerability is the function read_MSAT of the file ole.c. The manipulation with an unknown input leads to a double free vulnerability. The CWE definition for the vulnerability is CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. As an impact it is known to affect availability. The summary by CVE is:

The read_MSAT function in ole.c in libxls 1.4.0 has a double free that allows attackers to cause a denial of service (application crash) via a crafted file, a different vulnerability than CVE-2017-2897.

The bug was discovered 12/22/2018. The weakness was disclosed 12/25/2018 (Website). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2018-20450 since 12/25/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. 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 3 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entry VDB-128409 is pretty similar. Be aware that VulDB is the high quality source 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: 5.4

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/22/2018 🔍
12/25/2018 +3 days 🔍
12/25/2018 +0 days 🔍
12/25/2018 +0 days 🔍
12/26/2018 +1 days 🔍
06/22/2023 +1639 days 🔍

Sourcesinfo

Advisory: 34
Status: Not defined

CVE: CVE-2018-20450 (🔍)
GCVE (CVE): GCVE-0-2018-20450
GCVE (VulDB): GCVE-100-128407
See also: 🔍

Entryinfo

Created: 12/26/2018 21:37
Updated: 06/22/2023 07:27
Changes: 12/26/2018 21:37 (57), 04/24/2020 10:23 (1), 06/22/2023 07:27 (3)
Complete: 🔍
Cache ID: 216::103

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