Memory Leak Vulnerability in Dovecot
Summary
CVE-2017-15132: A flaw was found in dovecot 2.0 up to 2.2.33 and 2.3.0. Affects dovecot across 2 version ranges.
< 1a29ed2f96da1be22fa5a4d96c7583aa81b8b060
< 2.3.1-r0
Fixed in 2.3.1-r0. How to fix ↓
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Background
Dovecot is an open-source email server software that provides secure and efficient access to mailboxes. It is widely used in various Linux distributions, including Alpine Linux. The software is responsible for handling authentication processes for login sessions. However, a vulnerability has been discovered in versions 2.0 up to 2.2.33 and 2.3.0 of Dovecot, which can lead to a memory leak in the authentication client used by login processes. This vulnerability can have a significant impact on high-performance configurations where login processes are reused, potentially causing the process to crash due to memory exhaustion.
Vulnerability Detail
The vulnerability, identified as CVE-2017-15132, occurs when an abort of SASL authentication takes place. This results in a memory leak within the auth client of Dovecot, which is utilized by login processes. The memory leak becomes problematic in scenarios where the same login processes are reused, as it can eventually lead to memory exhaustion and subsequent process crashes. The severity of this vulnerability is rated as 7.5 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
How To Fix
Minimum fixed version
2.3.1-r0
This is the first release that contains the fix.
sudo apk add --upgrade dovecotTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no specific workaround mentioned for this vulnerability. The recommended solution is to upgrade to the fixed version of Dovecot.
Conclusion
In conclusion, the memory leak vulnerability in Dovecot can result in process crashes due to memory exhaustion. It is crucial to upgrade to the fixed version of Dovecot (2.3.1-r0 or later) to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
Dovecot is an open-source email server software that provides secure and efficient access to mailboxes.
Versions 2.0 up to 2.2.33 and 2.3.0 of Dovecot are affected by this vulnerability.
The vulnerability can lead to a memory leak in the authentication client of Dovecot, potentially causing process crashes due to memory exhaustion.
To fix this vulnerability, it is recommended to upgrade to version 2.3.1-r0 or any subsequent release of Dovecot.
No specific workaround is mentioned for this vulnerability. Upgrading to the fixed version is the recommended solution.
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