curl -- authentication buffer overflow vulnerability

Two iDEFENSE Security Advisories reports:

An exploitable stack-based buffer overflow condition exists when using NT Lan Manager (NTLM) authentication. The problem specifically exists within Curl_input_ntlm() defined in lib/http_ntlm.c.

Successful exploitation allows remote attackers to execute arbitrary code under the privileges of the target user. Exploitation requires that an attacker either coerce or force a target to connect to a malicious server using NTLM authentication.

[source]

An exploitable stack-based buffer overflow condition exists when using Kerberos authentication. The problem specifically exists within the functions Curl_krb_kauth() and krb4_auth() defined in lib/krb4.c.

Successful exploitation allows remote attackers to execute arbitrary code under the privileges of the target user. Exploitation requires that an attacker either coerce or force a target to connect to a malicious server using Kerberos authentication.

[source]