An issue was discovered in the function mark_beginning_as_normal in nfa.c in flex 2.6.4. There is a stack exhaustion problem caused by the mark_beginning_as_normal function making recursive calls to itself in certain scenarios involving lots of '*' characters. Remote attackers could leverage this vulnerability to cause a denial-of-service.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - An issue was discovered in the function mark_beginning_as_normal in nfa.c in flex 2.6.4. There is a stack
    exhaustion problem caused by the mark_beginning_as_normal function making recursive calls to itself in
    certain scenarios involving lots of '*' characters. Remote attackers could leverage this vulnerability to
    cause a denial-of-service. (CVE-2019-6293)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - An issue was discovered in the function mark_beginning_as_normal in nfa.c in flex 2.6.4. There is a stack     exhaustion problem caused by the mark_beginning_as_normal function making recursive calls to itself in     certain scenarios involving lots of '*' characters. Remote attackers could leverage this vulnerability to     cause a denial-of-service. (CVE-2019-6293)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of flex installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2019-6293 advisory.

  - An issue was discovered in the function mark_beginning_as_normal in nfa.c in flex 2.6.4. There is a stack     exhaustion problem caused by the mark_beginning_as_normal function making recursive calls to itself in     certain scenarios involving lots of '*' characters. Remote attackers could leverage this vulnerability to     cause a denial-of-service. (CVE-2019-6293)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
462960	Echo: flex: security update to 2.6.4-8.2+b4	Tenable Cloud Security	Echo Local Security Checks	Local	medium
462960	Echo: flex: security update to 2.6.4-8.2+b4	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
222882	Linux Distros Unpatched Vulnerability : CVE-2019-6293	Nessus	Misc.	Local	medium
201584	CBL Mariner 2.0 Security Update: flex (CVE-2019-6293)	Nessus	MarinerOS Local Security Checks	Local	medium

Detections

Analytics

CVE-2019-6293

medium

Tenable Plugins

medium

medium

medium

medium