Realtek RTL8195A up to 2.08 WPA2 Handshake AES_UnWRAP out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Realtek RTL8195A up to 2.08. It has been rated as critical. The impacted element is the function AES_UnWRAP of the component WPA2 Handshake Handler. The manipulation leads to out-of-bounds write. This vulnerability is documented as CVE-2020-25855. The attack can be initiated remotely. Additionally, an exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Realtek RTL8195A up to 2.08. This issue affects the function AES_UnWRAP of the component WPA2 Handshake Handler. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The function AES_UnWRAP() in the Realtek RTL8195A Wi-Fi Module prior to versions released in April 2020 (up to and excluding 2.08) does not validate the size parameter for a memcpy() operation, resulting in a stack buffer overflow which can be exploited for remote code execution or denial of service. An attacker can impersonate an Access Point and attack a vulnerable Wi-Fi client, by injecting a crafted packet into the WPA2 handshake. The attacker needs to know the network's PSK in order to exploit this.

The weakness was released 01/27/2023. It is possible to read the advisory at vdoo.com. The identification of this vulnerability is CVE-2020-25855 since 09/23/2020. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known.

The exploit is available at vdoo.com. It is declared as proof-of-concept.

Upgrading eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
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: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/23/2020 🔍
01/27/2023 +856 days 🔍
01/27/2023 +0 days 🔍
01/27/2023 +0 days 🔍

Sourcesinfo

Advisory: vdoo.com
Status: Confirmed

CVE: CVE-2020-25855 (🔍)
GCVE (CVE): GCVE-0-2020-25855
GCVE (VulDB): GCVE-100-219611
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/27/2023 12:54
Changes: 01/27/2023 12:54 (59)
Complete: 🔍
Cache ID: 216::103

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