CVE-2020-14354: Double Free
First published: Thu Aug 06 2020(Updated: )
A possible use-after-free and double-free in c-ares lib version 1.16.0 if ares_destroy() is called prior to ares_getaddrinfo() completing. This flaw possibly allows an attacker to crash the service that uses c-ares lib. The highest threat from this vulnerability is to this service availability.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| C-ares C-ares | =1.16.0 | |
| Fedoraproject Fedora | =33 | |
| redhat/c-ares | <1.16.1 | 1.16.1 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1866838
- https://c-ares.haxx.se/changelog.html
- https://github.com/c-ares/c-ares/commit/1cc7e83c3bdfaafbc5919c95025592d8de3a170e
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
- https://packetstormsecurity.com/files/158755/GS20200804145053.txt
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1866840
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
Frequently Asked Questions
What is CVE-2020-14354?
CVE-2020-14354 is a vulnerability in the c-ares library (version 1.16.0) that can lead to a use-after-free and double-free condition if the ares_destroy() function is called before ares_getaddrinfo() completes.
How does CVE-2020-14354 impact service availability?
CVE-2020-14354 can cause the service that uses the c-ares library to crash, resulting in a potential denial-of-service (DoS) situation.
What is the severity of CVE-2020-14354?
The severity of CVE-2020-14354 is medium, with a severity value of 3.3.
Which software versions are affected by CVE-2020-14354?
The c-ares library version 1.16.0 is affected by CVE-2020-14354. Fedora version 33 is also affected.
How can I fix CVE-2020-14354?
To fix CVE-2020-14354, update your c-ares library to version 1.16.1 or higher.
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