Linux Kernel up to 5.5.2 drivers/tty/n_tty.c n_tty_receive_buf_common use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.2$5k-$25k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Linux Kernel up to 5.5.2. Affected is the function n_tty_receive_buf_common of the file drivers/tty/n_tty.c. The manipulation leads to use after free. This vulnerability is listed as CVE-2020-8648. The attack must be carried out locally. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 5.5.2 (Operating System). This issue affects the function n_tty_receive_buf_common of the file drivers/tty/n_tty.c. 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:

There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the n_tty_receive_buf_common function in drivers/tty/n_tty.c.

The weakness was presented 02/06/2020. The identification of this vulnerability is CVE-2020-8648 since 02/06/2020. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 02/06/2020).

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

See VDB-149754 and VDB-149752 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.1
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: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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

02/06/2020 🔍
02/06/2020 +0 days 🔍
02/06/2020 +0 days 🔍
03/28/2024 +1512 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-4342-1
Status: Not defined

CVE: CVE-2020-8648 (🔍)
GCVE (CVE): GCVE-0-2020-8648
GCVE (VulDB): GCVE-100-149753
See also: 🔍

Entryinfo

Created: 02/06/2020 13:13
Updated: 03/28/2024 17:51
Changes: 02/06/2020 13:13 (38), 02/06/2020 13:18 (18), 03/28/2024 17:51 (18)
Complete: 🔍
Cache ID: 216::103

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

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