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CVE-2016-5417

Publication date 16 February 2017

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Memory leak in the __res_vinit function in the IPv6 name server management code in libresolv in GNU C Library (aka glibc or libc6) before 2.24 allows remote attackers to cause a denial of service (memory consumption) by leveraging partial initialization of internal resolver data structures.

From the Ubuntu Security Team

Tim Ruehsen discovered that the getaddrinfo() implementation in the GNU C Library did not properly track memory allocations. An attacker could use this to cause a denial of service.

Read the notes from the security team

Status

Package Ubuntu Release Status
eglibc 16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty
Not affected
12.04 LTS precise
Not affected
glibc 16.10 yakkety
Not affected
16.04 LTS xenial
Fixed 2.23-0ubuntu6
15.10 wily
Not affected
14.04 LTS trusty Not in release
12.04 LTS precise Not in release

Notes

sbeattie

introduced in 2.22 commit 2212c1420c92a33b0e0bd9a34938c9814a56c0f7

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
glibc

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H