Leptonica up to 1.75.2 Format fscanf/sscanf %s memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Leptonica up to 1.75.2. This issue affects the function fscanf/sscanf of the component Format Handler. The manipulation of the argument %s as part of Long String leads to memory corruption. This vulnerability is listed as CVE-2018-7186. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Leptonica up to 1.75.2 and classified as critical. This issue affects the function fscanf/sscanf of the component Format Handler. The manipulation of the argument %s as part of a Long String leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Leptonica before 1.75.3 does not limit the number of characters in a %s format argument to fscanf or sscanf, which allows remote attackers to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact via a long string, as demonstrated by the gplotRead and ptaReadStream functions.

The bug was discovered 02/16/2018. The weakness was presented 02/16/2018 (Website). The advisory is shared at bugs.debian.org. The identification of this vulnerability is CVE-2018-7186 since 02/16/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 108310 (Fedora 27 : leptonica / mingw-leptonica (2018-cbf621a53c)), 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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170914 (OpenSUSE Security Update for leptonica (openSUSE-SU-2018:0615-1)).

Upgrading to version 1.75.3 eliminates this vulnerability. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (108310). See VDB-113598 and VDB-113742 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 108310
Nessus Name: Fedora 27 : leptonica / mingw-leptonica (2018-cbf621a53c)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 863476
OpenVAS Name: Fedora Update for leptonica FEDORA-2018-cbf621a53c
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Leptonica 1.75.3
Patch: github.com

Timelineinfo

02/16/2018 🔍
02/16/2018 +0 days 🔍
02/16/2018 +0 days 🔍
02/16/2018 +0 days 🔍
02/17/2018 +1 days 🔍
03/13/2018 +24 days 🔍
03/14/2018 +1 days 🔍
02/08/2023 +1792 days 🔍

Sourcesinfo

Advisory: FEDORA-2018-cbf621a53c
Status: Not defined

CVE: CVE-2018-7186 (🔍)
GCVE (CVE): GCVE-0-2018-7186
GCVE (VulDB): GCVE-100-113513
See also: 🔍

Entryinfo

Created: 02/17/2018 11:15
Updated: 02/08/2023 11:39
Changes: 02/17/2018 11:15 (75), 01/06/2020 15:34 (2), 02/08/2023 11:24 (5), 02/08/2023 11:31 (1), 02/08/2023 11:39 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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