Skip to main content

Net CVE-2025-43857

MEDIUM
Uncontrolled Resource Consumption (CWE-400)
2025-04-28 security-advisories@github.com
6.0
CVSS 4.0 · GitHub Advisory
Share

Severity by source

GitHub Advisory PRIMARY
6.0 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
SUSE
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Red Hat
6.5 MEDIUM
qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

3
Analysis Generated
Mar 28, 2026 - 18:39 vuln.today
Patch released
Mar 28, 2026 - 18:39 nvd
Patch available
CVE Published
Apr 28, 2025 - 16:15 nvd
MEDIUM 6.0

DescriptionGitHub Advisory

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.5.7, 0.4.20, 0.3.9, and 0.2.5, there is a possibility for denial of service by memory exhaustion when net-imap reads server responses. At any time while the client is connected, a malicious server can send can send a "literal" byte count, which is automatically read by the client's receiver thread. The response reader immediately allocates memory for the number of bytes indicated by the server response. This should not be an issue when securely connecting to trusted IMAP servers that are well-behaved. It can affect insecure connections and buggy, untrusted, or compromised servers (for example, connecting to a user supplied hostname). This issue has been patched in versions 0.5.7, 0.4.20, 0.3.9, and 0.2.5.

AnalysisAI

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Rated medium severity (CVSS 6.0), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Uncontrolled Resource Consumption vulnerability could allow attackers to cause denial of service by exhausting system resources.

Technical ContextAI

This vulnerability is classified as Uncontrolled Resource Consumption (CWE-400), which allows attackers to cause denial of service by exhausting system resources. Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.5.7, 0.4.20, 0.3.9, and 0.2.5, there is a possibility for denial of service by memory exhaustion when net-imap reads server responses. At any time while the client is connected, a malicious server can send can send a "literal" byte count, which is automatically read by the client's receiver thread. The response reader immediately allocates memory for the number of bytes indicated by the server response. This should not be an issue when securely connecting to trusted IMAP servers that are well-behaved. It can affect insecure connections and buggy, untrusted, or compromised servers (for example, connecting to a user supplied hostname). This issue has been patched in versions 0.5.7, 0.4.20, 0.3.9, and 0.2.5. Affected products include: Ruby-Lang Net\.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Implement rate limiting, set resource quotas, validate input sizes, use timeouts.

More in Net

View all
CVE-2023-44487 HIGH POC
7.5 Oct 10

Denial of service against HTTP/2 server implementations allows remote unauthenticated attackers to exhaust server resour

CVE-2023-38180 HIGH
7.5 Aug 08

.NET and Visual Studio Denial of Service Vulnerability. Rated high severity (CVSS 7.5), this vulnerability is remotely e

CVE-2026-62886 HIGH POC
7.8 Aug 11

Privilege escalation in Microsoft .NET runtimes (8.0, 9.0, and 10.0) and Microsoft Visual Studio 2022 and 2026 results f

CVE-2026-62871 HIGH POC
7.8 Aug 11

Heap-based buffer overflow (CWE-122) in Microsoft .NET enables local code execution across all actively supported .NET r

CVE-2026-70354 HIGH POC
7.8 Aug 11

Local code execution via out-of-bounds write in Microsoft .NET allows an unauthenticated local attacker to achieve full

CVE-2026-62909 HIGH POC
7.8 Aug 11

Local privilege escalation in Microsoft .NET (versions 8.0, 9.0, and 10.0) and Microsoft Visual Studio 2022/2026 allows

CVE-2026-62901 HIGH POC
7.5 Aug 11

Denial-of-service in Microsoft .NET runtimes and Visual Studio allows unauthenticated remote attackers to crash or hang

CVE-2026-62897 HIGH POC
7.0 Aug 11

Integer overflow in Microsoft .NET Framework and modern .NET runtimes enables local code execution with full process com

CVE-2026-62898 HIGH POC
7.5 Aug 11

Use-after-free memory corruption in Microsoft's QUIC protocol implementation (MsQuic) exposes sensitive heap memory to u

CVE-2026-26127 HIGH POC
7.5 Mar 10

Out-of-bounds read in .NET allows an unauthorized attacker to deny service over a network. [CVSS 7.5 HIGH]

CVE-2026-33811 HIGH POC
7.5 May 07

Memory corruption in Go's net library (versions <1.25.10 and 1.26.0-1.26.2) leads to application crash when parsing mali

CVE-2026-39836 HIGH POC
7.5 May 07

Denial of service in the Go standard library's net package (on Windows) allows remote attackers to crash applications by

Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7 Fixed
SUSE Linux Enterprise High Availability Extension 16.0 Fixed
SUSE Linux Enterprise High Availability Extension 16.1 Fixed

Share

CVE-2025-43857 vulnerability details – vuln.today

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy