Wireshark up to 2.6.1 zlib Compression epan/tvbuff_zlib.c Negative Length out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Wireshark. It has been classified as critical. Affected is an unknown function in the library epan/tvbuff_zlib.c of the component zlib Compression. This manipulation as part of Negative Length causes out-of-bounds. This vulnerability is registered as CVE-2018-14340. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Wireshark (Packet Analyzer Software) and classified as critical. Affected by this vulnerability is an unknown code block in the library epan/tvbuff_zlib.c of the component zlib Compression. The manipulation as part of a Negative Length leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In Wireshark 2.6.0 to 2.6.1, 2.4.0 to 2.4.7, and 2.2.0 to 2.2.15, dissectors that support zlib decompression could crash. This was addressed in epan/tvbuff_zlib.c by rejecting negative lengths to avoid a buffer over-read.

The bug was discovered 07/18/2018. The weakness was published 07/19/2018 as Bug 14675 as confirmed bug report (Bugzilla). The advisory is shared at bugs.wireshark.org. This vulnerability is known as CVE-2018-14340 since 07/17/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 111392 (Debian DLA-1451-1 : wireshark security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 277436 (Fedora Security Update for wireshark (FEDORA-2018-9ef52861b5)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (111392) and SecurityFocus (BID 104847†). Similar entries are available at VDB-121944, VDB-121946, VDB-121947 and VDB-121948. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.7

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / 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: 111392
Nessus Name: Debian DLA-1451-1 : wireshark security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
Exposure Time: 🔍

Patch: 672d882a53f96730e4ef1e5b1639c585823b0df8

Timelineinfo

07/17/2018 🔍
07/18/2018 +0 days 🔍
07/18/2018 +0 days 🔍
07/18/2018 +0 days 🔍
07/19/2018 +1 days 🔍
07/19/2018 +0 days 🔍
07/29/2018 +10 days 🔍
07/30/2018 +1 days 🔍
04/18/2023 +1723 days 🔍

Sourcesinfo

Product: wireshark.org

Advisory: Bug 14675
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-14340 (🔍)
GCVE (CVE): GCVE-0-2018-14340
GCVE (VulDB): GCVE-100-121945
SecurityFocus: 104847 - Wireshark Multiple Denial of Service Vulnerabilities
SecurityTracker: 1041608

See also: 🔍

Entryinfo

Created: 07/19/2018 09:48
Updated: 04/18/2023 14:28
Changes: 07/19/2018 09:48 (77), 03/08/2020 15:27 (5), 04/18/2023 14:28 (6)
Complete: 🔍
Cache ID: 216::103

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

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