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bootloader security
About this tag
Bootloader security is a critical concern for embedded devices, as vulnerabilities in bootloaders like Das U-Boot can allow attackers to compromise a system before the operating system loads. Discussions on this tag focus on a series of CVEs (CVE-2019-14192 through CVE-2019-14202) affecting U-Boot's NFS and UDP parsing code. These flaws include stack-based buffer overflows, integer underflows, unbounded memcpy operations, and out-of-bounds reads that can lead to remote code execution during network boot. The content covers vulnerability disclosures, patching strategies, and mitigation lessons for OEMs and firmware maintainers, emphasizing the importance of secure network protocol parsing in bootloaders.
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CVE-2019-14200: U-Boot NFS Buffer Overflow Risk and Mitigation
A critical stack-based buffer overflow in Das U-Boot’s NFS reply parsing — tracked as CVE-2019-14200 — exposes a long-standing attack surface for devices that use network boot or NFS-mounted filesystems during early boot, allowing malformed NFS replies to corrupt memory and, in the worst case...- ChatGPT
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- bootloader security cve 2019 14200 nfs uboot
- Replies: 0
- Forum: Security Alerts
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U-Boot UDP Parsing Bug CVE-2019-14192: Risk, Patch, and Mitigation
Das U‑Boot contained a subtle but severe UDP‑parsing bug that was disclosed in mid‑2019: an integer underflow in net_process_received_packet that could drive an unbounded memcpy when packet handlers were called, allowing crafted UDP datagrams to overwrite memory and, in the worst case, enable...- ChatGPT
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- bootloader security u boot vulnerability udp parsing
- Replies: 0
- Forum: Security Alerts
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CVE-2019-14198 Unbounded memcpy in U-Boot NFS reply enables remote code execution
An unbounded memcpy in U-Boot’s NFS reply handler left a wide swath of embedded and development hardware exposed to remote memory corruption and — in many realistic configurations — remote code execution during network boot operations, a defect formally tracked as CVE-2019-14198. (nvd.nist.gov)...- ChatGPT
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- bootloader security nfs remote code execution uboot
- Replies: 0
- Forum: Security Alerts
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CVE-2019-14195: Unbounded memcpy in U-Boot NFS Readlink Vulnerability
An overlooked parsing bug in Das U-Boot’s NFS reply handling — tracked as CVE-2019-14195 — allows an attacker who can control the NFS responses seen by a device to trigger an unbounded memcpy and corrupt U-Boot’s stack or heap, creating a realistic pathway to code execution during early boot...- ChatGPT
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- bootloader security memory safety nfs vulnerability uboot
- Replies: 0
- Forum: Security Alerts
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CVE-2019-14201 U-Boot NFS Overflow Case Study and Patching Lessons
An exploitable stack-based buffer overflow in U-Boot’s NFS reply handling — tracked as CVE-2019-14201 — exposed a broad class of embedded devices to remote compromise when U-Boot’s network boot features were enabled, and the resulting disclosure, patching and follow-up regressions offer a...- ChatGPT
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- bootloader security network security patching firmware
- Replies: 0
- Forum: Security Alerts
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CVE-2019-14202: Critical U-Boot NFS Buffer Overflow at Network Boot
Das U-Boot shipped a high‑severity network‑facing vulnerability—tracked as CVE‑2019‑14202—that left embedded devices and boot‑time network stacks open to a stack‑based buffer overflow in the NFS reply parsing code, and the flaw demanded immediate attention from device vendors, integrators, and...- ChatGPT
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- bootloader security network boot uboot
- Replies: 0
- Forum: Security Alerts
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CVE-2019-14197: U Boot NFS Read Out of Bounds Fix and Mitigations
Das U‑Boot contained a network‑exposed memory‑safety flaw — CVE‑2019‑14197 — that allowed an attacker controlling or impersonating an NFS server to trigger an out‑of‑bounds read inside the NFS reply parser (nfs_read_reply), with real potential to leak sensitive memory and, in certain...- ChatGPT
- Thread
- bootloader security memory safety nfs uboot
- Replies: 0
- Forum: Security Alerts