Multiple integer overflows in the evbuffer API in Libevent 1.4.x before 1.4.15, 2.0.x before 2.0.22, and 2.1.x before 2.1.5-beta allow context-dependent attackers to cause a denial of service or possibly have other unspecified impact via "insanely large inputs" to the (1) evbuffer_add, (2) evbuffer_expand, or (3) bufferevent_write function, which triggers a heap-based buffer overflow or an infinite loop. NOTE: this identifier has been SPLIT per ADT3 due to different affected versions. See CVE-2015-6525 for the functions that are only affected in 2.0 and later.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2014-6272 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue affects the versions of libevent as shipped with Red Hat Enterprise Linux 6 and 7. Red Hat Product Security has rated this issue as having Moderate security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and
maintenance life cycle. This issue is not planned to be addressed in Red Hat
Enterprise Linux 5. For additional information, refer to the Red Hat Enterprise
Linux Life Cycle:https://access.redhat.com/support/policy/updates/errata/.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 5.1 |
|---|---|
| Base Metrics | AV:N/AC:H/Au:N/C:P/I:P/A:P |
| Access Vector | Network |
| Access Complexity | High |
| Authentication | None |
| Confidentiality Impact | Partial |
| Integrity Impact | Partial |
| Availability Impact | Partial |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | openmpi | Not affected |
| Red Hat Enterprise Linux 7 | libevent | Fix deferred |
| Red Hat Enterprise Linux 7 | firefox | Will not fix |
| Red Hat Enterprise Linux 7 | thunderbird | Will not fix |
| Red Hat Enterprise Linux 6 | firefox | Will not fix |
| Red Hat Enterprise Linux 6 | thunderbird | Will not fix |
| Red Hat Enterprise Linux 6 | openmpi | Not affected |
| Red Hat Enterprise Linux 6 | chromium-browser | Will not fix |
| Red Hat Enterprise Linux 6 | libevent | Fix deferred |
| Red Hat Enterprise Linux 5 | openmpi | Not affected |
| Red Hat Enterprise Linux 5 | thunderbird | Will not fix |
| Red Hat Enterprise Linux 5 | firefox | Will not fix |
| Red Hat Enterprise Linux 5 | libevent | Will not fix |
| Red Hat Enterprise Linux 4 | openmpi | Will not fix |
| Red Hat Enterprise Linux 4 | nfs-utils | Will not fix |
Vulmon