GNU gettext 0.19.8 read-catalog.c default_add_message double free

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in GNU gettext 0.19.8. This issue affects the function default_add_message of the file read-catalog.c. Executing a manipulation can lead to double free. The identification of this vulnerability is CVE-2018-18751. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in GNU gettext 0.19.8. This vulnerability affects the function default_add_message of the file read-catalog.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 confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in GNU gettext 0.19.8. There is a double free in default_add_message in read-catalog.c, related to an invalid free in po_gram_parse in po-gram-gen.y, as demonstrated by lt-msgfmt.

The bug was discovered 10/27/2018. The weakness was shared 10/28/2018 (Website). The advisory is shared for download at github.com. This vulnerability was named CVE-2018-18751 since 10/28/2018. The exploitation appears to be easy. 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 2 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 118906 (Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : gettext vulnerability (USN-3815-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197300 (Ubuntu Security Notification for Gettext Vulnerability (USN-3815-1)).

Upgrading 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 (118906). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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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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Nessus ID: 118906
Nessus Name: Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : gettext vulnerability (USN-3815-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

10/27/2018 🔍
10/28/2018 +0 days 🔍
10/28/2018 +1 days 🔍
10/29/2018 +0 days 🔍
10/29/2018 +0 days 🔍
11/12/2018 +14 days 🔍
11/13/2018 +1 days 🔍
06/03/2023 +1663 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: USN-3815-1
Status: Not defined

CVE: CVE-2018-18751 (🔍)
GCVE (CVE): GCVE-0-2018-18751
GCVE (VulDB): GCVE-100-126064

Entryinfo

Created: 10/29/2018 16:43
Updated: 06/03/2023 11:09
Changes: 10/29/2018 16:43 (71), 04/07/2020 11:33 (3), 06/03/2023 11:04 (4), 06/03/2023 11:09 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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