wolfSSL up to 4.2.0c ASN.1 Certificate wolfcrypt/src/asn.c out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in wolfSSL up to 4.2.0c. Impacted is an unknown function of the file wolfcrypt/src/asn.c of the component ASN.1 Certificate Handler. Performing a manipulation results in out-of-bounds write. This vulnerability was named CVE-2019-18840. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in wolfSSL up to 4.2.0c. It has been classified as critical. This affects an unknown functionality of the file wolfcrypt/src/asn.c of the component ASN.1 Certificate Handler. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In wolfSSL 4.1.0 through 4.2.0c, there are missing sanity checks of memory accesses in parsing ASN.1 certificate data while handshaking. Specifically, there is a one-byte heap-based buffer overflow inside the DecodedCert structure in GetName in wolfcrypt/src/asn.c because the domain name location index is mishandled. Because a pointer is overwritten, there is an invalid free.

The weakness was presented 11/09/2019. This vulnerability is uniquely identified as CVE-2019-18840 since 11/09/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, 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.

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Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.4

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

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector (MITRE): 🔍

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: 🔍
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

11/09/2019 🔍
11/09/2019 +0 days 🔍
11/10/2019 +1 days 🔍
02/11/2024 +1554 days 🔍

Sourcesinfo

Product: github.com

Advisory: 2555
Status: Not defined

CVE: CVE-2019-18840 (🔍)
GCVE (CVE): GCVE-0-2019-18840
GCVE (VulDB): GCVE-100-145293

Entryinfo

Created: 11/10/2019 06:24
Updated: 02/11/2024 09:37
Changes: 11/10/2019 06:24 (35), 11/10/2019 06:29 (17), 02/11/2024 09:32 (4), 02/11/2024 09:37 (10)
Complete: 🔍
Cache ID: 216::103

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