Qt up to 5.11.2 BMP Data QBmpHandler memory corruption

Summaryinfo

A vulnerability described as critical has been identified in Qt up to 5.11.2. Affected by this issue is the function QBmpHandler of the component BMP Data Handler. The manipulation results in memory corruption. This vulnerability was named CVE-2018-19873. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in Qt up to 5.11.2. Affected is the function QBmpHandler of the component BMP Data Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in Qt before 5.11.3. QBmpHandler has a buffer overflow via BMP data.

The bug was discovered 12/04/2018. The weakness was presented 12/26/2018 (Website). The advisory is shared for download at lists.opensuse.org. This vulnerability is traded as CVE-2018-19873 since 12/05/2018. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 14 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 119760 (SUSE SLED12 / SLES12 Security Update : libqt5-qtbase (SUSE-SU-2018:4179-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171779 (SUSE Enterprise Linux Security Update for libqt5-qtbase (SUSE-SU-2018:4179-1)).

Upgrading to version 5.11.3 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (119760). See VDB-128436, VDB-128445, VDB-128446 and VDB-128447 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

• Qt

Version

• 5.11.0
• 5.11.1
• 5.11.2

License

• open-source

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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