CVE-2019-12779 : libqb before 1.0.5 allows local users to overwrite arbitrary files via a symlink attack, because it uses predictable fil

libqb before 1.0.5 allows local users to overwrite arbitrary files via a symlink attack, because it uses predictable filenames (under /dev/shm and /tmp) without O_EXCL.

Published 2019-06-07 20:29:01

Updated 2021-07-03 05:15:07

Source MITRE

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2019-12779

EPSS FAQ

0.04%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 6 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-12779

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.6	MEDIUM	AV:L/AC:L/Au:N/C:N/I:C/A:C	3.9	9.2	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: Complete Availability Impact: Complete
7.1	HIGH	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H	1.8	5.2	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: High

CWE ids for CVE-2019-12779

CWE-59 Improper Link Resolution Before File Access ('Link Following')

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2019-12779

http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00031.html

[security-announce] openSUSE-SU-2019:1891-1: moderate: Security update f
https://access.redhat.com/errata/RHSA-2019:3610

RHSA-2019:3610 - Security Advisory - Red Hat Customer Portal
https://github.com/ClusterLabs/libqb/releases/tag/v1.0.4

Release v1.0.4 · ClusterLabs/libqb · GitHub
Release Notes;Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00017.html

[security-announce] openSUSE-SU-2019:1718-1: moderate: Security update f
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00027.html

[security-announce] openSUSE-SU-2019:1752-1: moderate: Security update f
https://github.com/ClusterLabs/libqb/releases/tag/v1.0.5

Release v1.0.5 · ClusterLabs/libqb · GitHub
Release Notes;Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1695948

1695948 – (CVE-2019-12779) CVE-2019-12779 libqb: Insecure treatment of IPC (temporary) files
Exploit;Patch;Third Party Advisory;VDB Entry
https://security.gentoo.org/glsa/202107-03

libqb: Insecure temporary file (GLSA 202107-03) — Gentoo security
https://github.com/ClusterLabs/libqb/issues/338

Insecure Temporary Files · Issue #338 · ClusterLabs/libqb · GitHub
Issue Tracking;Exploit;Patch;Third Party Advisory
http://www.securityfocus.com/bid/108691

Libqb CVE-2019-12779 Local Arbitrary File Overwrite Vulnerability
Third Party Advisory

Products affected by CVE-2019-12779

Clusterlabs » Libqb
Versions before (<) 1.0.5
cpe:2.3:a:clusterlabs:libqb:*:*:*:*:*:*:*:*
Matching versions

Vulnerability Details : CVE-2019-12779

Exploit prediction scoring system (EPSS) score for CVE-2019-12779

CVSS scores for CVE-2019-12779

CWE ids for CVE-2019-12779

References for CVE-2019-12779

Products affected by CVE-2019-12779