CVE-2015-2694

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.8 UNKNOWN
NETWORK
MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:N
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 33%
VendorProductVersion
mitkerberos_5
1.12
mitkerberos_5
1.12.1
mitkerberos_5
1.12.2
mitkerberos_5
1.12.3
mitkerberos_5
1.13
mitkerberos_5
1.13.1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
krb5
bullseye (security)
1.18.3-6+deb11u5
fixed
bullseye
1.18.3-6+deb11u5
fixed
wheezy
no-dsa
squeeze
no-dsa
bookworm
1.20.1-2+deb12u2
fixed
bookworm (security)
1.20.1-2+deb12u2
fixed
sid
1.21.3-3
fixed
trixie
1.21.3-3
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
krb5
wily
not-affected
vivid
Fixed 1.12.1+dfsg-18ubuntu0.1
released
utopic
ignored
trusty
Fixed 1.12+dfsg-2ubuntu5.2
released
precise
not-affected
lucid
not-affected
Common Weakness Enumeration
References
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8160
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.securityfocus.com/bid/74824
http://www.ubuntu.com/usn/USN-2810-1
https://github.com/krb5/krb5/commit/e3b5a5e5267818c97750b266df50b6a3d4649604
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8160
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.securityfocus.com/bid/74824
http://www.ubuntu.com/usn/USN-2810-1
https://github.com/krb5/krb5/commit/e3b5a5e5267818c97750b266df50b6a3d4649604