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CVE-2015-5180

Publication date 10 August 2015

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

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

From the Ubuntu Security Team

Florian Weimer discovered a NULL pointer dereference in the DNS resolver of the GNU C Library. An attacker could use this to cause a denial of service.

Read the notes from the security team

Status

Package Ubuntu Release Status
eglibc 20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
17.10 artful Not in release
17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
15.04 vivid Not in release
14.04 LTS trusty Ignored
12.04 LTS precise Ignored
glibc 20.04 LTS focal
Not affected
19.10 eoan
Not affected
19.04 disco
Not affected
18.10 cosmic
Not affected
18.04 LTS bionic
Not affected
17.10 artful Ignored
17.04 zesty Ignored
16.10 yakkety Ignored
16.04 LTS xenial Ignored
15.10 wily Ignored
15.04 vivid Ignored
14.04 LTS trusty Not in release
12.04 LTS precise Not in release

Notes

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.

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

References

Related Ubuntu Security Notices (USN)

    • USN-3239-1
    • GNU C Library vulnerabilities
    • 21 March 2017

Other references