CVE-2015-2698

Description

From CVE.org

The iakerb_gss_export_sec_context function in lib/gssapi/krb5/iakerb.c in MIT Kerberos 5 (aka krb5) 1.14 pre-release 2015-09-14 improperly accesses a certain pointer, which allows remote authenticated users to cause a denial of service (memory corruption) or possibly have unspecified other impact by interacting with an application that calls the gss_export_sec_context function. NOTE: this vulnerability exists because of an incorrect fix for CVE-2015-2696.

Statement

This issue did not affect the versions of krb5 as shipped with Red Hat Enterprise Linux 4, 5, 6, and 7.

Common Vulnerability Scoring System (CVSS) Score Details

Info alert:Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v2 Score Breakdown

Red HatNVDcve.org
Base Score48.5N/A
Attack VectorNetworkNetworkN/A
Access ComplexityLowMediumN/A
AuthenticationSingleSingleN/A
Confidentiality ImpactNoneCompleteN/A
Integrity ImpactNoneCompleteN/A
Availability ImpactPartialCompleteN/A

Vector

Red Hat: AV:N/AC:L/Au:S/C:N/I:N/A:P

NVD: AV:N/AC:M/Au:S/C:C/I:C/A:C

Understanding the Weakness (CWE)

CWE-843

Availability,Integrity,Confidentiality

Technical Impact: Read Memory; Modify Memory; Execute Unauthorized Code or Commands; DoS: Crash, Exit, or Restart

When a memory buffer is accessed using the wrong type, it could read or write memory out of the bounds of the buffer, if the allocated buffer is smaller than the type that the code is attempting to access, leading to a crash and possibly code execution.

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