CVE-2016-5417
Published: 16 February 2017
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.
Notes
| Author | Note |
|---|---|
| sbeattie | introduced in 2.22 commit 2212c1420c92a33b0e0bd9a34938c9814a56c0f7 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
eglibc Launchpad, Ubuntu, Debian |
precise |
Not vulnerable
(pre 2.22)
|
| trusty |
Not vulnerable
(pre 2.22)
|
|
| upstream |
Not vulnerable
(pre 2.22)
|
|
| wily |
Does not exist
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
|
glibc Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| wily |
Not vulnerable
(pre 2.22)
|
|
| xenial |
Released
(2.23-0ubuntu6)
|
|
| yakkety |
Not vulnerable
(2.24-0ubuntu1)
|
|
|
Patches: upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5e7fdabd7df1fc6c56d104e61390bf5a6b526c38 upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=317da342ba4417c30d985f5593d78bb1364a62c3 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| 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 |