GNU C Library 2.14 Tilde Expansion use after free

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability was found in GNU C Library 2.14. It has been classified as critical. Affected by this vulnerability is an unknown functionality of the component Tilde Expansion Handler. The manipulation leads to use after free. This vulnerability is traded as CVE-2020-1752. An attack has to be approached locally. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in GNU C Library 2.14 (Software Library). This issue affects an unknown code block of the component Tilde Expansion Handler. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out. Directory paths containing an initial tilde followed by a valid username were affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path that, when processed by the glob function, would potentially lead to arbitrary code execution. This was fixed in version 2.32.

The weakness was shared 04/30/2020 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. The identification of this vulnerability is CVE-2020-1752 since 11/27/2019. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

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

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.6

VulDB Base Score: 5.9
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.0
NVD Vector: 🔍

CNA Base Score: 7.0
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: Partially

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: 🔍

Patch: ddc650e9b3dc916eab417ce9f79e67337b05035c

Timelineinfo

11/27/2019 🔍
04/30/2020 +155 days 🔍
05/01/2020 +1 days 🔍
06/04/2024 +1495 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: USN-4416-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-1752 (🔍)
GCVE (CVE): GCVE-0-2020-1752
GCVE (VulDB): GCVE-100-154649

Entryinfo

Created: 05/01/2020 09:02
Updated: 06/04/2024 20:23
Changes: 05/01/2020 09:02 (39), 05/01/2020 09:07 (12), 10/14/2020 17:08 (1), 10/14/2020 17:12 (1), 06/04/2024 20:16 (17), 06/04/2024 20:23 (18)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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