CVE-2015-5180

2015-08-1000:00:00

ubuntu.com

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

0.017 Low

EPSS

Percentile

87.7%

res_query in libresolv in glibc before 2.25 allows remote attackers to
cause a denial of service (NULL pointer dereference and process crash).

Author	Note
tyhicks	See test case in the bug no fix upstream as of 2016-09-09
sbeattie	patch committed upstream on 2016-12-31; renames symbol so backporting may not be easy. commit included in glibc 2.25 release debian fixed this in unstable in 2.24-9 fixing this does indeed break the internal ABI between libnss_dns and libresolv. We’re backing out this change. reverted from zesty in 2.24-9ubuntu2 by infinity. For existing releases, DO NOT APPLY THIS PATCH due to ABI breakage. Fix will come in to 17.10 when we get glibc-2.25 as we do not guarantee ABI for libresolv internals across different glibc releases, just for upgrades for same versions e.g. (2.24 -> 2.24) REPEAT: DO NOT APPLY THIS PATCH (UNMODIFIED) IN A STABLE RELEASE
mdeslaur	marking this issue as ignored, as we will not be fixing this in Ubuntu stable releases.