CVE-2020-10595

https://notcve.org/view.php?id=CVE-2020-10595

pam-krb5 before 4.9 has a buffer overflow that might cause remote code execution in situations involving supplemental prompting by a Kerberos library. It may overflow a buffer provided by the underlying Kerberos library by a single '\0' byte if an attacker responds to a prompt with an answer of a carefully chosen length. The effect may range from heap corruption to stack corruption depending on the structure of the underlying Kerberos library, with unknown effects but possibly including code execution. This code path is not used for normal authentication, but only when the Kerberos library does supplemental prompting, such as with PKINIT or when using the non-standard no_prompt PAM configuration option. pam-krb5 versiones anteriores a 4.9, presenta un desbordamiento del búfer que puede causar una ejecución de código remota en situaciones que involucran una sugerencia suplementaria para una biblioteca de Kerberos. Esto puede desbordar un búfer proporcionado por la biblioteca Kerberos subyacente por un solo byte "\0" si un atacante responde a un aviso con una respuesta de una longitud cuidadosamente elegida. • http://www.openwall.com/lists/oss-security/2020/03/31/1 https://github.com/rra/pam-krb5/commit/e7879e27a37119fad4faf133a9f70bdcdc75d760 https://lists.debian.org/debian-lts-announce/2020/04/msg00000.html https://usn.ubuntu.com/4314-1 https://www.debian.org/security/2020/dsa-4648 https://www.eyrie.org/~eagle/software/pam-krb5/security/2020-03-30.html • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') •