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u-boot

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A buffer overflow vulnerability exists in the net/bootp.c component of DENEX U-Boot from its initial 2002 commit through all current versions on any platform. This flaw allows a local network attacker to leak between four and 32 bytes of memory beyond the intended packet boundary via crafted DHCP responses. The vulnerability affects many Ubuntu-packaged versions of U-Boot spanning multiple LTS releases and other versions. The CVSS 3.1 score is 8.1, indicating high confidentiality impact and high availability impact but no integrity impact. No official patch or remediation information is provided in the input data.

CVE-2024-42040 is a buffer overflow vulnerability in the net/bootp.c file of DENEX U-Boot present from its initial commit in 2002 through all current versions on any platform. An attacker on the local network can exploit this by sending crafted DHCP responses that cause leakage of 4 to 32 bytes of memory beyond the packet boundary. This memory leak depends on how DHCP parameters are later used. The vulnerability affects numerous Ubuntu versions of U-Boot, including multiple LTS releases from 16.04 through 26.04 and other versions. The CVSS 3.1 vector is AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H, reflecting a high impact on confidentiality and availability without requiring privileges or user interaction.

Detailed information about Buffer Overflow vulnerability in the net/bootp.c in DENEX U-Boot from its initial commit in 2002 (3861aa5) up to today on any platfor

Buffer Overflow vulnerability in the net/bootp.c in DENEX U-Boot from its initial commit in 2002 (3861aa5) up to today on any platform allows an… (CVE-2024-42040) - Live Threat Intelligence - Threat Radar | OffSeq.com

Buffer Overflow vulnerability in the net/bootp.c in DENEX U-Boot from its initial commit in 2002 (3861aa5) up to today on any platform allows an… (CVE-2024-42040)

Buffer Overflow vulnerability in the net/bootp.c in DENEX U-Boot from its initial commit in 2002 (3861aa5) up to today on any platform allows an attacker on the local network to leak memory from four up to 32 bytes of memory stored behind the packet to the network depending on the later use of DHCP-provided parameters via crafted DHCP responses.

CVE-2024-42040 is a buffer overflow vulnerability identified in the net/bootp.c source file of DENEX U-Boot, a widely used open-source bootloader for embedded systems. This vulnerability has existed since the initial commit of the codebase in 2002 and persists across all platforms running this U-Boot version. The flaw arises from improper handling of DHCP responses, specifically in the processing of DHCP-provided parameters. An attacker positioned on the same local network can craft malicious DHCP responses that trigger a buffer overflow, causing the system to leak between 4 and 32 bytes of memory located beyond the intended packet boundaries. The amount of leaked memory depends on how the DHCP parameters are subsequently used. The vulnerability is classified under CWE-120 (Classic Buffer Overflow), indicating a failure to properly validate input sizes before copying data. The CVSS v3.1 base score is 8.1, reflecting high severity due to the attack vector requiring only local network access (AV:A), low attack complexity (AC:L), no privileges required (PR:N), and no user interaction (UI:N). The impact includes high confidentiality loss (C:H) and high availability impact (A:H), but no integrity impact (I:N). Although no public patches or known exploits are currently available, the long-standing presence of this vulnerability in a critical bootloader component makes it a significant concern for embedded device security. Exploitation could allow attackers to glean sensitive memory contents, potentially exposing cryptographic keys, credentials, or other sensitive data, and cause denial of service by destabilizing the boot process.

Detailed information about CVE-2024-42040: n/a. Get real-time updates, technical details, and mitigation strategies.

CVE-2024-42040: n/a - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2024-42040: n/a


Buffer Overflow vulnerability in the net/bootp.c in DENEX U-Boot from its initial commit in 2002 (3861aa5) up to today on any platform allows an… (CVE-2024-42040)CVE-2024-42040 0 A buffer overflow vulnerability exists in the net/bootp.c component of DENEX U-Boot from its initial 2002 commit through all current versions on any platform. This flaw allows a local network attacker to leak between four and 32 bytes of memory beyond the intended packet boundary via crafted DHCP responses. The vulnerability affects many Ubuntu-packaged versions of U-Boot spanning multiple LTS releases and other versions. The CVSS 3.1 score is 8.1, indicating high confidentiality impact and high availability impact but no integrity impact. No official patch or remediation information is provided in the input data. MediumVulnerability#gcve #osv #ubuntu-cve-2024-42040 Join the discussion	GCVE Database	08/23/2024, 15:15:00 UTC Added: 08/26/2026, 15:02:06 UTC
CVE-2024-42040: n/aCVE-2024-42040 0 Buffer Overflow vulnerability in the net/bootp.c in DENEX U-Boot from its initial commit in 2002 (3861aa5) up to today on any platform allows an attacker on the local network to leak memory from four up to 32 bytes of memory stored behind the packet to the network depending on the later use of DHCP-provided parameters via crafted DHCP responses. HighVulnerabilityUnited StatesChinaGermany+7#cve #cve-2024-42040 Join the discussion	CVE Database V5	08/23/2024, 00:00:00 UTC Added: 02/25/2026, 21:42:24 UTC

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