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CVE-2005-0490

Multiple stack-based buffer overflows in libcURL and cURL 7.12.1, and possibly other versions,...

8.8 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

5.73%Up 1.3 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 8.8

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.

Record
CVE-2005-0490
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
5.1 MediumAV:N/AC:H/Au:N/C:P/I:P/A:P
Weakness
CWE-131
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2005-0490
Updated
2026-11-02
EUVDEUVD-2005-0491 No score

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.

Record
EUVD-2005-0491
Updated
2026-11-03
GitHub AdvisoriesGHSA-7mv6-r5f6-w598 8.8

Multiple stack-based buffer overflows in libcURL and cURL 7.12.1, and possibly other versions,...

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.

Record
GHSA-7mv6-r5f6-w598
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-131
Updated
2026-11-02
OSV 8.8

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.

Record
CVE-2005-0490
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2005-0490 8.8

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.

Record
DEBIAN-CVE-2005-0490
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVCURL-CVE-2005-0490 No score

Authentication Buffer Overflows

Due to bad usage of the base64 decode function to a stack-based buffer without checking the data length, it was possible for a malicious HTTP server to overflow the client during NTLM negotiation and for an FTP server to overflow the client during krb4 negotiation. The announcement of this flaw was done without contacting us.

Record
CURL-CVE-2005-0490
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
curl
Debian:12
 before 7.13.0-2
7.13.0-2
curl
Debian:13
 before 7.13.0-2
7.13.0-2
curl
Debian:14
 before 7.13.0-2
7.13.0-2
curl
Red Hat:enterprise_linux:3::as
 before 0:7.10.6-6.rhel3
0:7.10.6-6.rhel3
curl-debuginfo
Red Hat:enterprise_linux:3::as
 before 0:7.10.6-6.rhel3
0:7.10.6-6.rhel3
curl-devel
Red Hat:enterprise_linux:3::as
 before 0:7.10.6-6.rhel3
0:7.10.6-6.rhel3
curl
Red Hat:enterprise_linux:3::desktop
 before 0:7.10.6-6.rhel3
0:7.10.6-6.rhel3
curl-debuginfo
Red Hat:enterprise_linux:3::desktop
 before 0:7.10.6-6.rhel3
0:7.10.6-6.rhel3
curl-devel
Red Hat:enterprise_linux:3::desktop
 before 0:7.10.6-6.rhel3
0:7.10.6-6.rhel3
curl
Red Hat:enterprise_linux:3::es
 before 0:7.10.6-6.rhel3
0:7.10.6-6.rhel3
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Affected packages
PackageAffectedFixed
curl-debuginfo
Red Hat:enterprise_linux:3::es
 before 0:7.10.6-6.rhel3
0:7.10.6-6.rhel3
curl-devel
Red Hat:enterprise_linux:3::es
 before 0:7.10.6-6.rhel3
0:7.10.6-6.rhel3
curl
Red Hat:enterprise_linux:3::ws
 before 0:7.10.6-6.rhel3
0:7.10.6-6.rhel3
curl-debuginfo
Red Hat:enterprise_linux:3::ws
 before 0:7.10.6-6.rhel3
0:7.10.6-6.rhel3
curl-devel
Red Hat:enterprise_linux:3::ws
 before 0:7.10.6-6.rhel3
0:7.10.6-6.rhel3
curl
Red Hat:enterprise_linux:4::as
 before 0:7.12.1-5.rhel4
0:7.12.1-5.rhel4
curl-debuginfo
Red Hat:enterprise_linux:4::as
 before 0:7.12.1-5.rhel4
0:7.12.1-5.rhel4
curl-devel
Red Hat:enterprise_linux:4::as
 before 0:7.12.1-5.rhel4
0:7.12.1-5.rhel4
curl
Red Hat:enterprise_linux:4::desktop
 before 0:7.12.1-5.rhel4
0:7.12.1-5.rhel4
curl-debuginfo
Red Hat:enterprise_linux:4::desktop
 before 0:7.12.1-5.rhel4
0:7.12.1-5.rhel4
curl-devel
Red Hat:enterprise_linux:4::desktop
 before 0:7.12.1-5.rhel4
0:7.12.1-5.rhel4
curl
Red Hat:enterprise_linux:4::es
 before 0:7.12.1-5.rhel4
0:7.12.1-5.rhel4
curl-debuginfo
Red Hat:enterprise_linux:4::es
 before 0:7.12.1-5.rhel4
0:7.12.1-5.rhel4
curl-devel
Red Hat:enterprise_linux:4::es
 before 0:7.12.1-5.rhel4
0:7.12.1-5.rhel4
curl
Red Hat:enterprise_linux:4::ws
 before 0:7.12.1-5.rhel4
0:7.12.1-5.rhel4
curl-debuginfo
Red Hat:enterprise_linux:4::ws
 before 0:7.12.1-5.rhel4
0:7.12.1-5.rhel4
curl-devel
Red Hat:enterprise_linux:4::ws
 before 0:7.12.1-5.rhel4
0:7.12.1-5.rhel4

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2005-0490 is a high vulnerability (CVSS 8.8) in Haxx Curl, published February 21, 2005. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.73%, the 93rd percentile. Fixed in curl 7.13.0-2.

References

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