7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.214 Low
EPSS
Percentile
96.5%
MIT krb5 is the free implementation of the Kerberos network authentication protocol by the Massachusetts Institute of Technology.
The implementation of the Key Distribution Center (KDC) and the MIT krb5 library contain double-free vulnerabilities, making client programs as well as application servers vulnerable.
The ASN.1 decoder library is vulnerable to a denial of service attack, including the KDC.
The double-free vulnerabilities could allow an attacker to execute arbitrary code on a KDC host and hosts running krb524d or vulnerable services. In the case of a KDC host, this can lead to a compromise of the entire Kerberos realm. Furthermore, an attacker impersonating a legitimate KDC or application server can potentially execute arbitrary code on authenticating clients.
An attacker can cause a denial of service for a KDC or application server and clients, the latter if impersonating a legitimate KDC or application server.
There is no known workaround at this time.
All mit-krb5 users should upgrade to the latest stable version:
# emerge sync
# emerge -pv ">=app-crypt/mit-krb5-1.3.4"
# emerge ">=app-crypt/mit-krb5-1.3.4"
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Gentoo | any | all | app-crypt/mit-krb5 | < 1.3.4 | UNKNOWN |
7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.214 Low
EPSS
Percentile
96.5%