International Components for Unicode 63.1 number_decimalquantity.cpp toScientificString integer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k0.00

A vulnerability was found in International Components for Unicode 63.1 and classified as critical. Affected by this issue is the function number::impl::DecimalQuantity::toScientificString of the file i18n/number_decimalquantity.cpp. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is confidentiality, integrity, and availability. CVE summarizes:

International Components for Unicode (ICU) for C/C++ 63.1 has an integer overflow in number::impl::DecimalQuantity::toScientificString() in i18n/number_decimalquantity.cpp.

The bug was discovered 11/02/2018. The weakness was released 11/04/2018 (Website). The advisory is available at bugs.chromium.org. This vulnerability is handled as CVE-2018-18928 since 11/04/2018. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 120841 (Fedora 29 : icu (2018-db05d9982f)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l.

Upgrading eliminates this vulnerability. A possible mitigation has been published 5 days after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (120841).

Productinfo

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 120841
Nessus Name: Fedora 29 : icu (2018-db05d9982f)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: github.com

Timelineinfo

11/02/2018 🔍
11/04/2018 +2 days 🔍
11/04/2018 +0 days 🔍
11/04/2018 +0 days 🔍
11/05/2018 +1 days 🔍
11/09/2018 +4 days 🔍
01/03/2019 +55 days 🔍
06/04/2023 +1613 days 🔍

Sourcesinfo

Advisory: FEDORA-2018-db05d9982f
Status: Not defined

CVE: CVE-2018-18928 (🔍)

Entryinfo

Created: 11/05/2018 10:33
Updated: 06/04/2023 14:35
Changes: 11/05/2018 10:33 (65), 04/10/2020 08:12 (3), 06/04/2023 14:32 (5), 06/04/2023 14:35 (1)
Complete: 🔍

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