Qt up to 5.11.2 QXmlStream XML Document double free

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.4$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Qt up to 5.11.2. Affected by this vulnerability is an unknown functionality of the component QXmlStream. The manipulation as part of XML Document results in double free. This vulnerability is identified as CVE-2018-15518. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Qt up to 5.11.2. It has been classified as critical. Affected is an unknown function of the component QXmlStream. The manipulation as part of a XML Document leads to a double free vulnerability. CWE is classifying the issue as CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

QXmlStream in Qt 5.x before 5.11.3 has a double-free or corruption during parsing of a specially crafted illegal XML document.

The bug was discovered 12/04/2018. The weakness was released 12/26/2018 (Website). The advisory is shared for download at lists.opensuse.org. This vulnerability is traded as CVE-2018-15518 since 08/18/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly 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). Entries connected to this vulnerability are available at VDB-128445, VDB-128446, VDB-128447 and VDB-128448. Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 119760
Nessus Name: SUSE SLED12 / SLES12 Security Update : libqt5-qtbase (SUSE-SU-2018:4179-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Qt 5.11.3

Timelineinfo

08/18/2018 🔍
12/04/2018 +108 days 🔍
12/18/2018 +14 days 🔍
12/19/2018 +1 days 🔍
12/26/2018 +7 days 🔍
12/26/2018 +0 days 🔍
12/27/2018 +1 days 🔍
06/22/2023 +1638 days 🔍

Sourcesinfo

Advisory: RHSA-2019:2135
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-15518 (🔍)
GCVE (CVE): GCVE-0-2018-15518
GCVE (VulDB): GCVE-100-128436
See also: 🔍

Entryinfo

Created: 12/27/2018 11:03
Updated: 06/22/2023 08:56
Changes: 12/27/2018 11:03 (72), 04/24/2020 13:00 (2), 06/22/2023 08:56 (4)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!