The DNS stub resolver in the GNU C Library (aka glibc or libc6) beforeversion 2.26, when EDNS support is enabled, will solicit large UDP responses from name servers, potentially simplifying off-path DNS spoofing attacks due to IP fragmentation.
NOTE: The following CVSS v2.0 metrics and score provided are preliminary and subject to review.
|Base Score:||4.3||Base Metrics:||AV:N/AC:M/Au:N/C:N/I:P/A:N|
|Access Vector:||Network||Attack Complexity:||Medium|
|Authentication:||None required||Confidentiality Impact:||None|
|Integrity Impact:||Partial||Availability Impact:||None|
|Oracle Linux version 7 (glibc)||ELSA-2018-0805||2018-04-16|
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