CVE-2015-6525: Buffer Overflow
First published: Mon Aug 24 2015(Updated: )
Multiple integer overflows in the evbuffer API in Libevent 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_prepend, (3) evbuffer_expand, (4) exbuffer_reserve_space, or (5) evbuffer_read function, which triggers a heap-based buffer overflow or an infinite loop. NOTE: this identifier was SPLIT from CVE-2014-6272 per ADT3 due to different affected versions.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Debian Linux | =7.1 | |
| Red Hat Libevent | =2.0.1 | |
| Red Hat Libevent | =2.0.2 | |
| Red Hat Libevent | =2.0.3 | |
| Red Hat Libevent | =2.0.4 | |
| Red Hat Libevent | =2.0.5 | |
| Red Hat Libevent | =2.0.6 | |
| Red Hat Libevent | =2.0.7 | |
| Red Hat Libevent | =2.0.8 | |
| Red Hat Libevent | =2.0.9 | |
| Red Hat Libevent | =2.0.10 | |
| Red Hat Libevent | =2.0.11 | |
| Red Hat Libevent | =2.0.12 | |
| Red Hat Libevent | =2.0.13 | |
| Red Hat Libevent | =2.0.14 | |
| Red Hat Libevent | =2.0.15 | |
| Red Hat Libevent | =2.0.16 | |
| Red Hat Libevent | =2.0.17 | |
| Red Hat Libevent | =2.0.18 | |
| Red Hat Libevent | =2.0.19 | |
| Red Hat Libevent | =2.0.20 | |
| Red Hat Libevent | =2.0.21 | |
| Red Hat Libevent | =2.1.1 | |
| Red Hat Libevent | =2.1.2 | |
| Red Hat Libevent | =2.1.3 | |
| Red Hat Libevent | =2.1.4 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2015-6525?
CVE-2015-6525 is considered to have a high severity due to potential denial of service vulnerabilities.
How do I fix CVE-2015-6525?
To fix CVE-2015-6525, upgrade to Libevent version 2.0.22 or 2.1.5-beta or later.
Which software is affected by CVE-2015-6525?
CVE-2015-6525 affects all versions of Libevent prior to 2.0.22 and 2.1.5-beta.
What types of attacks can CVE-2015-6525 facilitate?
CVE-2015-6525 can enable context-dependent attackers to cause denial of service attacks.
Is CVE-2015-6525 exploit-related to input sizes?
Yes, CVE-2015-6525 is associated with vulnerabilities triggered by excessively large inputs.
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- version/red hat libevent/2.1.1
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