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    CVE-2003-0001

    Multiple ethernet Network Interface Card (NIC) device drivers do not pad frames with null bytes, which allows remote attackers to obtain information from previous packets or kernel memory by using malformed packets, as demonstrated by Etherleak.

    Published:Jan 6, 2003
    Last Modified:Apr 16, 2026
    EPS:Jan 8, 2003
    EPSS Score:0.03432
    CVSS Score:5.3

    Affected Products

    Vendor
    Freebsd
    Product
    Freebsd
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Microsoft
    Product
    Windows 2000
    Vendor
    Microsoft
    Product
    Windows 2000 Terminal Services
    Vendor
    Netbsd
    Product
    Netbsd
    Vendor
    Redhat
    Product
    Linux

    Exploits

    https://www.exploit-db.com/exploits/22131https://github.com/marb08/etherleak-checkerhttps://www.exploit-db.com/exploits/26076https://www.exploit-db.com/exploits/3555

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-116 Excavation
    CAPEC-13 Subverting Environment Variable Values
    CAPEC-169 Footprinting
    CAPEC-22 Exploiting Trust in Client
    CAPEC-224 Fingerprinting
    CAPEC-285 ICMP Echo Request Ping
    CAPEC-287 TCP SYN Scan
    CAPEC-290 Enumerate Mail Exchange (MX) Records
    CAPEC-291 DNS Zone Transfers
    CAPEC-292 Host Discovery
    CAPEC-293 Traceroute Route Enumeration
    CAPEC-294 ICMP Address Mask Request
    CAPEC-295 Timestamp Request
    CAPEC-296 ICMP Information Request
    CAPEC-297 TCP ACK Ping
    CAPEC-298 UDP Ping
    CAPEC-299 TCP SYN Ping
    CAPEC-300 Port Scanning
    CAPEC-301 TCP Connect Scan
    CAPEC-302 TCP FIN Scan
    CAPEC-303 TCP Xmas Scan
    CAPEC-304 TCP Null Scan
    CAPEC-305 TCP ACK Scan
    CAPEC-306 TCP Window Scan
    CAPEC-307 TCP RPC Scan
    CAPEC-308 UDP Scan
    CAPEC-309 Network Topology Mapping
    CAPEC-310 Scanning for Vulnerable Software
    CAPEC-312 Active OS Fingerprinting
    CAPEC-313 Passive OS Fingerprinting
    CAPEC-317 IP ID Sequencing Probe
    CAPEC-318 IP 'ID' Echoed Byte-Order Probe
    CAPEC-319 IP (DF) 'Don't Fragment Bit' Echoing Probe
    CAPEC-320 TCP Timestamp Probe
    CAPEC-321 TCP Sequence Number Probe
    CAPEC-322 TCP (ISN) Greatest Common Divisor Probe
    CAPEC-323 TCP (ISN) Counter Rate Probe
    CAPEC-324 TCP (ISN) Sequence Predictability Probe
    CAPEC-325 TCP Congestion Control Flag (ECN) Probe
    CAPEC-326 TCP Initial Window Size Probe
    CAPEC-327 TCP Options Probe
    CAPEC-328 TCP 'RST' Flag Checksum Probe
    CAPEC-329 ICMP Error Message Quoting Probe
    CAPEC-330 ICMP Error Message Echoing Integrity Probe
    CAPEC-472 Browser Fingerprinting
    CAPEC-497 File Discovery
    CAPEC-508 Shoulder Surfing
    CAPEC-573 Process Footprinting
    CAPEC-574 Services Footprinting
    CAPEC-575 Account Footprinting
    CAPEC-576 Group Permission Footprinting
    CAPEC-577 Owner Footprinting
    CAPEC-59 Session Credential Falsification through Prediction
    CAPEC-60 Reusing Session IDs (aka Session Replay)
    CAPEC-616 Establish Rogue Location
    CAPEC-643 Identify Shared Files/Directories on System
    CAPEC-646 Peripheral Footprinting
    CAPEC-651 Eavesdropping
    CAPEC-79 Using Slashes in Alternate Encoding

    Related CVEs

    CVE-2026-58094 (CVSS 7.8) — The FIOSSHMLPGCNF ioctl(2) operation configures the page size for a largepage shared memory object. This is i…
    CVE-2026-58093 (CVSS 7) — The TIOCSCTTY ioctl handler drops the tty lock in order to acquire the process tree lock. After reacquiring t…
    CVE-2026-58097 (CVSS 7.8) — mp_SetEnddisc() copied a user-supplied PSN endpoint value without length validation, allowing a buffer overflo…
    CVE-2026-58096 (CVSS 8.8) — LcpDecodeConfig() did not validate the length of received endpoint discriminator options against the minimum r…
    CVE-2026-58095 (CVSS 8.8) — mp_Enddisc() used incorrect length calculations when formatting endpoint discriminator addresses for display, …
    CVE-2026-58092 (CVSS 8.1) — In FreeBSD 15.0, the kernel structure used to represent user credentials changed: previously the primary group…
    CVE-2026-58091 (CVSS 7.8) — The implementation of this ioctl attempts to acquire locks on all channels in a sync group. If locking a chan…
    CVE-2026-58090 (CVSS 7.8) — The SOCK_STREAM receive path in the unix socket implementation failed to fully detach control messages from th…
    CVE-2026-58089 (CVSS 7.8) — When a process calls execve(2) to execute a setuid or setgid image, hwpmc(4) is supposed to detach PMCs owned …
    CVE-2026-58088 (CVSS 7.4) — The ELF core dump code counted the number of dumpable VM map entries, allocated a buffer for the corresponding…

    References

    http://archives.neohapsis.com/archives/vulnwatch/2003-q1/0016.html
    http://marc.info/?l=bugtraq&m=104222046632243&w=2
    http://secunia.com/advisories/7996
    http://www.atstake.com/research/advisories/2003/a010603-1.txt
    http://www.atstake.com/research/advisories/2003/atstake_etherleak_report.pdf
    http://www.kb.cert.org/vuls/id/412115
    http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
    http://www.osvdb.org/9962
    http://www.redhat.com/support/errata/RHSA-2003-025.html
    http://www.redhat.com/support/errata/RHSA-2003-088.html
    http://www.securityfocus.com/archive/1/305335/30/26420/threaded
    http://www.securityfocus.com/archive/1/307564/30/26270/threaded
    http://www.securitytracker.com/id/1031583
    http://www.securitytracker.com/id/1040185
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2665
    http://archives.neohapsis.com/archives/vulnwatch/2003-q1/0016.html
    http://marc.info/?l=bugtraq&m=104222046632243&w=2
    http://secunia.com/advisories/7996
    http://www.atstake.com/research/advisories/2003/a010603-1.txt
    http://www.atstake.com/research/advisories/2003/atstake_etherleak_report.pdf
    http://www.kb.cert.org/vuls/id/412115
    http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
    http://www.osvdb.org/9962
    http://www.redhat.com/support/errata/RHSA-2003-025.html
    http://www.redhat.com/support/errata/RHSA-2003-088.html
    http://www.securityfocus.com/archive/1/305335/30/26420/threaded
    http://www.securityfocus.com/archive/1/307564/30/26270/threaded
    http://www.securitytracker.com/id/1031583
    http://www.securitytracker.com/id/1040185
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2665

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High