Ubuntu update for Qt



Risk Low
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2018-15518
CVE-2018-19870
CVE-2018-19873
CWE-ID CWE-611
CWE-476
CWE-119
Exploitation vector Network
Public exploit N/A
Vulnerable software
 qtbase-opensource-src (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) XXE attack

EUVDB-ID: #VU17337

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-15518

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

Exploit availability: No

Description

The vulnerability allows a remote attacker to conduct XXE-attack.

The vulnerability exists due to improper handling of XML External Entities (XXEs) when parsing an XML file. A remote attacker can trick the victim into opening an XML file that submits malicious input, trigger a double-free error in QXmlStream and cause the service to crash.

Mitigation

Update the affected packages.

Ubuntu 18.10
libqt5core5a - 5.11.1+dfsg-7ubuntu3.1
libqt5gui5 - 5.11.1+dfsg-7ubuntu3.1
Ubuntu 18.04 LTS
libqt5core5a - 5.9.5+dfsg-0ubuntu2.1
libqt5gui5 - 5.9.5+dfsg-0ubuntu2.1
Ubuntu 16.04 LTS
libqt5core5a - 5.5.1+dfsg-16ubuntu7.6
libqt5gui5 - 5.5.1+dfsg-16ubuntu7.6

Vulnerable software versions

qtbase-opensource-src (Ubuntu package): 5.5.1+dfsg-16ubuntu7 - 5.11.1+dfsg-7ubuntu3

CPE2.3 External links

https://usn.ubuntu.com/4003-1/


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) NULL pointer dereference

EUVDB-ID: #VU17338

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-19870

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error in QGifHandler. A remote attacker can trick the victim into opening a specially crafted GIF image, trigger a segmentation fault and cause the service to crash.

Mitigation

Update the affected packages.

Ubuntu 18.10
libqt5core5a - 5.11.1+dfsg-7ubuntu3.1
libqt5gui5 - 5.11.1+dfsg-7ubuntu3.1
Ubuntu 18.04 LTS
libqt5core5a - 5.9.5+dfsg-0ubuntu2.1
libqt5gui5 - 5.9.5+dfsg-0ubuntu2.1
Ubuntu 16.04 LTS
libqt5core5a - 5.5.1+dfsg-16ubuntu7.6
libqt5gui5 - 5.5.1+dfsg-16ubuntu7.6

Vulnerable software versions

qtbase-opensource-src (Ubuntu package): 5.5.1+dfsg-16ubuntu7 - 5.11.1+dfsg-7ubuntu3

CPE2.3 External links

https://usn.ubuntu.com/4003-1/


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.

3) Buffer overflow

EUVDB-ID: #VU17339

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-19873

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to buffer overflow in QBmpHandler. A remote attacker can trick the victim into opening specially crafted BMP data, trigger memory corruption and cause the service to crash.

Mitigation

Update the affected packages.

Ubuntu 18.10
libqt5core5a - 5.11.1+dfsg-7ubuntu3.1
libqt5gui5 - 5.11.1+dfsg-7ubuntu3.1
Ubuntu 18.04 LTS
libqt5core5a - 5.9.5+dfsg-0ubuntu2.1
libqt5gui5 - 5.9.5+dfsg-0ubuntu2.1
Ubuntu 16.04 LTS
libqt5core5a - 5.5.1+dfsg-16ubuntu7.6
libqt5gui5 - 5.5.1+dfsg-16ubuntu7.6

Vulnerable software versions

qtbase-opensource-src (Ubuntu package): 5.5.1+dfsg-16ubuntu7 - 5.11.1+dfsg-7ubuntu3

CPE2.3 External links

https://usn.ubuntu.com/4003-1/


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.



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