GNU Patch up to 2.7.6 Incomplete Fix CVE-2018-6952 pch.c another_hunk double free

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in GNU Patch up to 2.7.6. This affects the function another_hunk of the file pch.c of the component Incomplete Fix CVE-2018-6952. Such manipulation leads to double free. This vulnerability is traded as CVE-2019-20633. An attack has to be approached locally. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in GNU Patch up to 2.7.6. Affected by this issue is the function another_hunk of the file pch.c of the component Incomplete Fix CVE-2018-6952. The manipulation with an unknown input leads to a double free vulnerability. Using CWE to declare the problem leads to CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. Impacted is availability. CVE summarizes:

GNU patch through 2.7.6 contains a free(p_line[p_end]) Double Free vulnerability in the function another_hunk in pch.c that can cause a denial of service via a crafted patch file. NOTE: this issue exists because of an incomplete fix for CVE-2018-6952.

The weakness was shared 03/25/2020. This vulnerability is handled as CVE-2019-20633 since 03/25/2020. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

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

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

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.3
VulDB Temp Score: 3.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: Partially
Local: Yes
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

03/25/2020 🔍
03/25/2020 +0 days 🔍
03/26/2020 +1 days 🔍
05/11/2025 +1872 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: savannah.gnu.org
Status: Not defined

CVE: CVE-2019-20633 (🔍)
GCVE (CVE): GCVE-0-2019-20633
GCVE (VulDB): GCVE-100-152264

Entryinfo

Created: 03/26/2020 07:12
Updated: 05/11/2025 17:35
Changes: 03/26/2020 07:12 (37), 03/26/2020 07:17 (17), 05/11/2024 14:20 (17), 05/11/2025 17:35 (4)
Complete: 🔍
Cache ID: 216::103

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