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    CVE-2004-1008

    Integer signedness error in the ssh2_rdpkt function in PuTTY before 0.56 allows remote attackers to execute arbitrary code via a SSH2_MSG_DEBUG packet with a modified stringlen parameter, which leads to a buffer overflow.

    Published:Dec 1, 2004
    Last Modified:Apr 16, 2026
    EPS:Dec 1, 2004
    EPSS Score:0.09179
    CVSS Score:10

    Affected Products

    Vendor
    Putty
    Product
    Putty
    Vendor
    Tortoisecvs
    Product
    Tortoisecvs

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-48852 (CVSS 3.7) — PuTTY 0.71 before 0.84 has an assertion failure in ECDSA signature verification.…
    CVE-2026-48851 (CVSS 3.1) — PuTTY 0.77 before 0.84 uses a copy of the PuTTY icon as a trust indication for TELNET data but the trust statu…
    CVE-2026-48850 (CVSS 3.7) — PuTTY 0.72 before 0.84 has a double free in RSA KEX.…
    CVE-2026-4115 (CVSS 2.9) — A vulnerability was detected in PuTTY 0.83. Affected is the function eddsa_verify of the file crypto/ecc-ssh.c…
    CVE-2024-31497 (CVSS 5.9) — In PuTTY 0.68 through 0.80 before 0.81, biased ECDSA nonce generation allows an attacker to recover a user's N…
    CVE-2023-48795 (CVSS 5.9) — The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, al…
    CVE-2021-36367 (CVSS 8.1) — PuTTY through 0.75 proceeds with establishing an SSH session even if it has never sent a substantive authentic…
    CVE-2021-33500 (CVSS 7.5) — PuTTY before 0.75 on Windows allows remote servers to cause a denial of service (Windows GUI hang) by telling …
    CVE-2020-14002 (CVSS 5.9) — PuTTY 0.68 through 0.73 has an Observable Discrepancy leading to an information leak in the algorithm negotiat…
    CVE-2019-17067 (CVSS 9.8) — PuTTY before 0.73 on Windows improperly opens port-forwarding listening sockets, which allows attackers to lis…

    References

    http://marc.info/?l=bugtraq&m=109889312917613&w=2
    http://secunia.com/advisories/12987/
    http://secunia.com/advisories/13012/
    http://secunia.com/advisories/17214
    http://www-1.ibm.com/support/docview.wss?uid=ssg1S1002414
    http://www-1.ibm.com/support/docview.wss?uid=ssg1S1002416
    http://www.chiark.greenend.org.uk/~sgtatham/putty/
    http://www.gentoo.org/security/en/glsa/glsa-200410-29.xml
    http://www.idefense.com/application/poi/display?id=155&type=vulnerabilities&flashstatus=true
    http://www.securityfocus.com/bid/11549
    https://exchange.xforce.ibmcloud.com/vulnerabilities/17886
    http://marc.info/?l=bugtraq&m=109889312917613&w=2
    http://secunia.com/advisories/12987/
    http://secunia.com/advisories/13012/
    http://secunia.com/advisories/17214
    http://www-1.ibm.com/support/docview.wss?uid=ssg1S1002414
    http://www-1.ibm.com/support/docview.wss?uid=ssg1S1002416
    http://www.chiark.greenend.org.uk/~sgtatham/putty/
    http://www.gentoo.org/security/en/glsa/glsa-200410-29.xml
    http://www.idefense.com/application/poi/display?id=155&type=vulnerabilities&flashstatus=true
    http://www.securityfocus.com/bid/11549
    https://exchange.xforce.ibmcloud.com/vulnerabilities/17886

    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