CVE-2018-5744: A specially crafted packet can cause named to leak memory
Document version: 2.0
Posting date: 21 February 2019
Program impacted: BIND
Versions affected: BIND 9.10.7 -> 9.10.8-P1, 9.11.3 -> 9.11.5-P1, 9.12.0 -> 9.12.3-P1, and versions 9.10.7-S1 -> 9.11.5-S3 of BIND 9 Supported Preview Edition. Versions 9.13.0 -> 9.13.6 of the 9.13 development branch are also affected.
A failure to free memory can occur when processing messages having a specific combination of EDNS options.
By exploiting this condition, an attacker can potentially cause named's memory use to grow without bounds until all memory available to the process is exhausted. Typically a server process is limited as to the amount of memory it can use but if the named process is not limited by the operating system all free memory on the server could be exhausted.
CVSS Score: 7.5
CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
For more information on the Common Vulnerability Scoring System and to obtain your specific environmental score please visit: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Upgrade to a version of BIND containing a fix for the memory leak.
- BIND 9.11.5-P4
- BIND 9.12.3-P4
BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers.
- BIND 9.11.5-S5
Acknowledgements: ISC would like to thank Toshifumi Sakaguchi for reporting this issue to us.
Document revision history:
1.0 Advance Notification, 16 January 2019
2.0 Public Disclosure, 21 February 2019
See our BIND 9 Security Vulnerability Matrix for a complete listing of security vulnerabilities and versions affected.
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ISC patches only currently supported versions. When possible we indicate EOL versions affected. (For current information on which versions are actively supported, please see https://www.isc.org/downloads/.)
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