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    CVE-2005-0490

    Multiple stack-based buffer overflows in libcURL and cURL 7.12.1, and possibly other versions, allow remote malicious web servers to execute arbitrary code via base64 encoded replies that exceed the intended buffer lengths when decoded, which is not properly handled by (1) the Curl_input_ntlm function in http_ntlm.c during NTLM authentication or (2) the Curl_krb_kauth and krb4_auth functions in krb4.c during Kerberos authentication.

    Published:Feb 21, 2005
    Last Modified:Apr 16, 2026
    EPS:Feb 21, 2005
    EPSS Score:0.02576
    CVSS Score:8.8

    Affected Products

    Vendor
    Haxx
    Product
    Curl
    Vendor
    Haxx
    Product
    Libcurl
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-100 Overflow Buffers
    CAPEC-47 Buffer Overflow via Parameter Expansion

    Related CVEs

    CVE-2026-7168 (CVSS 5.3) — Successfully using libcurl to do a transfer over a specific HTTP proxy (`proxyA`) with **Digest** authenticati…
    CVE-2026-7009 (CVSS 5.3) — When curl is told to use the Certificate Status Request TLS extension, often referred to as *OCSP stapling*, t…
    CVE-2026-6429 (CVSS 5.3) — When asked to both use a `.netrc` file for credentials and to follow HTTP redirects, libcurl could leak the pa…
    CVE-2026-4873 (CVSS 5.9) — A vulnerability exists where a connection requiring TLS incorrectly reuses an existing unencrypted connection …
    CVE-2026-6253 (CVSS 5.9) — curl might erroneously pass on credentials for a first proxy to a second proxy. This can happen when the foll…
    CVE-2026-5773 (CVSS 7.5) — libcurl might in some circumstances reuse the wrong connection for SMB(S) transfers. libcurl features a pool …
    CVE-2026-5545 (CVSS 6.5) — libcurl might in some circumstances reuse the wrong connection when asked to do an authenticated HTTP(S) reque…
    CVE-2026-6276 (CVSS 7.5) — Using libcurl, when a custom `Host:` header is first set for an HTTP request and a second request is subsequen…
    CVE-2026-3805 (CVSS 7.5) — When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into al…
    CVE-2026-3784 (CVSS 6.5) — curl would wrongly reuse an existing HTTP proxy connection doing CONNECT to a server, even if the new request …

    References

    http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000940
    http://marc.info/?l=full-disclosure&m=110959085507755&w=2
    http://www.gentoo.org/security/en/glsa/glsa-200503-20.xml
    http://www.idefense.com/application/poi/display?id=202&type=vulnerabilities
    http://www.idefense.com/application/poi/display?id=203&type=vulnerabilities
    http://www.mandriva.com/security/advisories?name=MDKSA-2005:048
    http://www.novell.com/linux/security/advisories/2005_11_curl.html
    http://www.redhat.com/support/errata/RHSA-2005-340.html
    http://www.securityfocus.com/bid/12615
    http://www.securityfocus.com/bid/12616
    https://exchange.xforce.ibmcloud.com/vulnerabilities/19423
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10273
    http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000940
    http://marc.info/?l=full-disclosure&m=110959085507755&w=2
    http://www.gentoo.org/security/en/glsa/glsa-200503-20.xml
    http://www.idefense.com/application/poi/display?id=202&type=vulnerabilities
    http://www.idefense.com/application/poi/display?id=203&type=vulnerabilities
    http://www.mandriva.com/security/advisories?name=MDKSA-2005:048
    http://www.novell.com/linux/security/advisories/2005_11_curl.html
    http://www.redhat.com/support/errata/RHSA-2005-340.html
    http://www.securityfocus.com/bid/12615
    http://www.securityfocus.com/bid/12616
    https://exchange.xforce.ibmcloud.com/vulnerabilities/19423
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10273

    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