VulnerabilityModified

CVE-2017-15088

CRITICAL 9.8EPSS 8.30%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (8.30%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

plugins/preauth/pkinit/pkinit_crypto_openssl.c in MIT Kerberos 5 (aka krb5) through 1.15.2 mishandles Distinguished Name (DN) fields, which allows remote attackers to execute arbitrary code or cause a denial of service (buffer overflow and application crash) in situations involving untrusted X.509 data, related to the get_matching_data and X509_NAME_oneline_ex functions. NOTE: this has security relevance only in use cases outside of the MIT Kerberos distribution, e.g., the use of get_matching_data in KDC certauth plugin code that is specific to Red Hat.

CVSS 3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 8.30% probability · 95th percentile
CISA KEV: Not listed
Weakness: CWE-121, CWE-119
Affected: mit/kerberos 5
Source: secalert@redhat.com

References

http://www.securityfocus.com/bid/101594Third Party Advisory, VDB Entry
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871698Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1504045Issue Tracking, Patch, Third Party Advisory
https://github.com/krb5/krb5/commit/fbb687db1088ddd894d975996e5f6a4252b9a2b4Issue Tracking, Patch, Third Party Advisory
https://github.com/krb5/krb5/pull/707Patch, Third Party Advisory
http://www.securityfocus.com/bid/101594Third Party Advisory, VDB Entry
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871698Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1504045Issue Tracking, Patch, Third Party Advisory
https://github.com/krb5/krb5/commit/fbb687db1088ddd894d975996e5f6a4252b9a2b4Issue Tracking, Patch, Third Party Advisory
https://github.com/krb5/krb5/pull/707Patch, Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.