Security Advisory

1) Out-of-bounds read

Severity: Low

CVSSv3:
3.8 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID:
CVE-2019-18281

CWE-ID:
CWE-125 – Out-of-bounds Read

Exploit availability:
No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition within the generateDirectionalRuns() function in qtextengine.cpp in Qt qtbase. A remote attacker can create a specially crafted file, containing many directional characters, trick the victim into opening it, trigger out-of-bounds read error and crash the affected application.

Mitigation

Update the affected packages.
dev-qt/qtcore to version: 5.13.2-r2

Vulnerable software versions

Gentoo Linux:

CPE
External links

https://security.gentoo.org/https://security.gentoo.org/glsa/202003-60

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Untrusted search path

Severity: Low

CVSSv3:
6.8 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID:
CVE-2020-0569

CWE-ID:
CWE-426 – Untrusted Search Path

Exploit availability:
No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to QPluginLoader in Qt searches for certain plugins first on the current working directory of the application. A local user can place files in the file system and influence the working directory of Qt-based applications to load and execute malicious code. 

Note, this vulnerability does not affect Windows systems.

Mitigation

Update the affected packages.
dev-qt/qtcore to version: 5.13.2-r2

Vulnerable software versions

Gentoo Linux:

CPE
External links

https://security.gentoo.org/https://security.gentoo.org/glsa/202003-60

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Untrusted search path

Severity: Low

CVSSv3:
6.8 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID:
CVE-2020-0570

CWE-ID:
CWE-426 – Untrusted Search Path

Exploit availability:
No

Description

The vulnerability allows a local user to escalate privileges on the system.

The
vulnerability exists due to QLibrary in Qt on certain x86 machines searches for certain libraries and plugins relative to current working directory of the application. A
local user can place files in the file system and influence the working
directory of Qt-based applications to load and execute malicious code. 

Note, this vulnerability does not affect Windows systems.

Mitigation

Update the affected packages.
dev-qt/qtcore to version: 5.13.2-r2

Vulnerable software versions

Gentoo Linux:

CPE
External links

https://security.gentoo.org/https://security.gentoo.org/glsa/202003-60

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.





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