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OVAL Definitions
>
OVAL Definition Details
Id
oval:com.altx-soft.nix:def:26423
[Rus]
Version
2
Class
patch
ALTXid
153698
Language
English
Severity
NotAvailable
Title
ALAS-2015-624 -- security update for krb5
Description
A flaw was found in the OTP kdcpreauth module of MIT Kerberos. A remote attacker could use this flaw to bypass the requires_preauth flag on a client principal and obtain a ciphertext encrypted in the principal's long-term key. This ciphertext could be used to conduct an off-line dictionary attack against the user's password.
It was found that the krb5_read_message() function of MIT Kerberos did not correctly sanitize input, and could create invalid krb5_data objects. A remote, unauthenticated attacker could use this flaw to crash a Kerberos child process via a specially crafted request.
Family
unix
Platform
Amazon Linux AMI
Product
krb5
Reference
VENDOR: ALAS-2015-624
VENDOR: ALAS-2015-624
Id:
ALAS-2015-624
Reference:
https://alas.aws.amazon.com/ALAS-2015-624.html
CVE: CVE-2015-2694
CVE: CVE-2015-2694
Id:
CVE-2015-2694
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2694
Comment
: The kdcpreauth modules in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.2 do not properly track whether a client's request has been validated, which allows remote attackers to bypass an intended preauthentication requirement by providing (1) zero bytes of data or (2) an arbitrary realm name, related to plugins/preauth/otp/main.c and plugins/preauth/pkinit/pkinit_srv.c.
CVSSv2 Score:
5.8
Access vector:
NETWORK
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
PARTIAL
Integrity impact:
PARTIAL
Availability impact:
NONE
CVSSv2 Vector:
AV:N/AC:M/Au:N/C:P/I:P/A:N
CWE:
264 (Permissions, Privileges, and Access Controls)
References:
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8160 (CONFIRM)
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html (CONFIRM)
74824 (BID)
USN-2810-1 (UBUNTU)
https://github.com/krb5/krb5/commit/e3b5a5e5267818c97750b266df50b6a3d4649604 (CONFIRM)
CVE: CVE-2014-5355
CVE: CVE-2014-5355
Id:
CVE-2014-5355
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-5355
Comment
: MIT Kerberos 5 (aka krb5) through 1.13.1 incorrectly expects that a krb5_read_message data field is represented as a string ending with a '\0' character, which allows remote attackers to (1) cause a denial of service (NULL pointer dereference) via a zero-byte version string or (2) cause a denial of service (out-of-bounds read) by omitting the '\0' character, related to appl/user_user/server.c and lib/krb5/krb/recvauth.c.
CVSSv2 Score:
5
Access vector:
NETWORK
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
PARTIAL
CVSSv2 Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P
CWE:
CWE-Other ()
References:
https://github.com/krb5/krb5/commit/102bb6ebf20f9174130c85c3b052ae104e5073ec (CONFIRM)
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8050 (CONFIRM)
openSUSE-SU-2015:0542 (SUSE)
MDVSA-2015:069 (MANDRIVA)
RHSA-2015:0794 (REDHAT)
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html (CONFIRM)
http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html (CONFIRM)
USN-2810-1 (UBUNTU)
74042 (BID)
[debian-lts-announce] 20180131 [SECURITY] [DLA 1265-1] krb5 security update (MLIST)
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