simple-dhcp-server emdns Server emdns.c emdns_resolve_raw stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability was found in simple-dhcp-server. It has been classified as critical. This affects the function emdns_resolve_raw of the file emdns.c of the component emdns Server. This manipulation causes stack-based overflow. This vulnerability is registered as CVE-2023-50434. Remote exploitation of the attack is possible. No exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability has been found in simple-dhcp-server (unknown version) and classified as critical. Affected by this vulnerability is the function emdns_resolve_raw of the file emdns.c of the component emdns Server. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

emdns_resolve_raw in emdns.c in emdns through fbd1eef calls strlen with an input that may not be '\0' terminated, leading to a stack-based buffer over-read. This can be triggered by a remote adversary that can send DNS requests to the emdns server. The impact could vary depending on the system libraries, compiler, and processor architecture. Code before be565c3 is unaffected.

It is possible to read the advisory at papers.mathyvanhoef.com. This vulnerability is known as CVE-2023-50434 since 12/09/2023. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

Applying the patch be565c3 is able to eliminate this problem.

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

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / 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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: be565c3

Timelineinfo

12/09/2023 🔍
04/30/2024 +142 days 🔍
04/30/2024 +0 days 🔍
04/30/2024 +0 days 🔍

Sourcesinfo

Advisory: papers.mathyvanhoef.com
Status: Confirmed

CVE: CVE-2023-50434 (🔍)
GCVE (CVE): GCVE-0-2023-50434
GCVE (VulDB): GCVE-100-262435

Entryinfo

Created: 04/30/2024 06:49
Changes: 04/30/2024 06:49 (54)
Complete: 🔍
Cache ID: 216::103

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