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CVE-2020-15101

Nested directory structure can lead to Uncontrolled Resource Consumption in freewvs

2.8 LowFix available

In freewvs before 0.1.1, a directory structure of more than 1000 nested directories can interrupt a freewvs scan due to Python's recursion limit and os.walk(). This can be problematic in a case where an administrator scans the dirs of potentially untrusted users. This has been patched in 0.1.1.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
Required

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
Low

Exploit likelihood

0.69%Up 0.1 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 2.8

Nested directory structure can lead to Uncontrolled Resource Consumption in freewvs

In freewvs before 0.1.1, a directory structure of more than 1000 nested directories can interrupt a freewvs scan due to Python's recursion limit and os.walk(). This can be problematic in a case where an administrator scans the dirs of potentially untrusted users. This has been patched in 0.1.1.

Record
CVE-2020-15101
CVSS 3.1
2.8 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Weakness
CWE-400
Updated
2026-11-02
EUVDEUVD-2020-0082 2.8

In freewvs before 0.1.1, a directory structure of more than 1000 nested directories can interrupt a freewvs scan due to Python's recursion limit and os.walk(). This can be problematic in a case where an administrator scans the dirs of potentially untrusted users. This has been patched in 0.1.1.

Record
EUVD-2020-0082
CVSS 3.1
2.8 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Updated
2026-11-03
GitHub AdvisoriesGHSA-7pmh-vrww-25xx 2.4

freewvs's nested directory structure can interrupt scan

Impact

A directory structure of more than 1000 nested directories can interrupt a freewvs scan due to Python's recursion limit and os.walk(). This can be problematic in a case where an administrator scans the dirs of potentially untrusted users.

Patches

This has been fixed in this commit by limiting the recursion to 500 directories: https://github.com/schokokeksorg/freewvs/commit/83a6b55c0435c69f447488b791555e6078803143

This issue was discovered by Hanno Böck.

Record
GHSA-7pmh-vrww-25xx
CVSS 4.0
2.4 LowCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS 3.1
2.8 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Weakness
CWE-674
Updated
2026-11-02
NVD 2.8

In freewvs before 0.1.1, a directory structure of more than 1000 nested directories can interrupt a freewvs scan due to Python's recursion limit and os.walk(). This can be problematic in a case where an administrator scans the dirs of potentially untrusted users. This has been patched in 0.1.1.

Record
CVE-2020-15101
CVSS 3.1
2.8 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
CVSS 3.1
3.3 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS 2.0
4.0 MediumAV:N/AC:L/Au:S/C:N/I:N/A:P
Weakness
CWE-400, CWE-674
Updated
2026-11-02
OSV 3.3

In freewvs before 0.1.1, a directory structure of more than 1000 nested directories can interrupt a freewvs scan due to Python's recursion limit and os.walk(). This can be problematic in a case where an administrator scans the dirs of potentially untrusted users. This has been patched in 0.1.1.

Record
CVE-2020-15101
CVSS 3.1
3.3 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Updated
2026-11-02
OSVGHSA-7pmh-vrww-25xx 2.4

freewvs's nested directory structure can interrupt scan

Impact

A directory structure of more than 1000 nested directories can interrupt a freewvs scan due to Python's recursion limit and os.walk(). This can be problematic in a case where an administrator scans the dirs of potentially untrusted users.

Patches

This has been fixed in this commit by limiting the recursion to 500 directories: https://github.com/schokokeksorg/freewvs/commit/83a6b55c0435c69f447488b791555e6078803143

This issue was discovered by Hanno Böck.

Record
GHSA-7pmh-vrww-25xx
CVSS 4.0
2.4 LowCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS 3.1
2.8 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Weakness
CWE-674
Updated
2026-11-02
OSVPYSEC-2020-233 No score

In freewvs before 0.1.1, a directory structure of more than 1000 nested directories can interrupt a freewvs scan due to Python's recursion limit and os.walk(). This can be problematic in a case where an administrator scans the dirs of potentially untrusted users. This has been patched in 0.1.1.

Record
PYSEC-2020-233
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
freewvs
PyPI
before 0.1.1
0.1.1
freewvs
PyPI
before 0.1.1, plus listed versions
0.1.0
0.1.1

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-15101 is a low vulnerability (CVSS 2.8) in Schokokeks Freewvs, published July 14, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.69%, the 53rd percentile. Fixed in freewvs 0.1.1.

References

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