VDB-127043 · CVE-2018-19387 · Qualys 277588

tmux up to 2.8 format.c format_cb_pane_tabs null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in tmux up to 2.8. It has been rated as problematic. This issue affects the function format_cb_pane_tabs of the file format.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

format_cb_pane_tabs in format.c in tmux 2.7 through 2.8 might allow attackers to cause a denial of service (NULL Pointer Dereference and application crash) by arranging for a malloc failure.

The bug was discovered 11/19/2018. The weakness was presented 11/20/2018 (Website). It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2018-19387 since 11/20/2018. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 120729 (Fedora 28 : tmux (2018-b74b9ac8d1)), 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 277588 (Fedora Security Update for tmux (FEDORA-2018-b74b9ac8d1)).

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 vulnerability database at Tenable (120729). See VDB-23821 and VDB-34684 for similar entries.





CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
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Class: Null pointer dereference
CWE: CWE-476 / CWE-404

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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Nessus ID: 120729
Nessus Name: Fedora 28 : tmux (2018-b74b9ac8d1)
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: Upgrade
Status: 🔍

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Patch: github.com


11/19/2018 🔍
11/20/2018 +1 days 🔍
11/20/2018 +0 days 🔍
11/21/2018 +1 days 🔍
12/04/2018 +13 days 🔍
01/03/2019 +30 days 🔍
06/11/2023 +1620 days 🔍


Advisory: b32e1d34e10a0da806823f57f02a4ae6e93d756e
Status: Not defined

CVE: CVE-2018-19387 (🔍)
See also: 🔍


Created: 11/21/2018 12:26 PM
Updated: 06/11/2023 09:01 AM
Changes: 11/21/2018 12:26 PM (46), 04/14/2020 11:41 AM (11), 06/11/2023 09:01 AM (3)
Complete: 🔍
Cache ID: 3:5DF:40


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