CVE-2020-10595
pam_krb5: incorrect input handling results in single byte buffer overflow which may lead to heap corruption
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · March 31, 2020
Updated · June 27, 2026
Description
A flaw was found during prompting initiated by the Kerberos library, where an attacker who enters a response exactly as long as the length of the buffer provided by the underlying Kerberos library, causes pam-krb5 to write a single null byte past the end of that buffer. This flaw results in heap corruption or a single-byte overwrite of another stack variable, with unknown consequences.
Statement
This issue does not affect the versions of pam_krb5 package shipped with Red Hat Products (https://pagure.io/pam_krb5)
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7.5CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-193 · Off-by-one Error