CVE-2020-12831

Information disclosure via world-readable split-config files

Published May 13, 2020 · Updated Aug 4, 2024

Information disclosure in FRRouting FRR 7.3.1 and earlier allows local users to read sensitive split-config files. In split-config mode, tools/frr.in and tools/frrcommon.sh.in create daemon configuration files without applying FRR's configured 0600 mode, leaving the process's permissive default mode in effect. Exposure requires sensitive data such as BGP credentials in a file that remains world-readable; the record is disputed because users control permissions before sensitive content is written.

CVSS severity5.3
Medium
EPSS probability1.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in FRRouting FRR 7.3.1 and earlier allows local users to read sensitive split-config files. In split-config mode, tools/frr.in and tools/frrcommon.sh.in create daemon configuration files without applying FRR's configured 0600 mode, leaving the process's permissive default mode in effect. Exposure requires sensitive data such as BGP credentials in a file that remains world-readable; the record is disputed because users control permissions before sensitive content is written.

The record

CVE
CVE-2020-12831
Published
May 13, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-732, T1552.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 13, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource
T1552.001Credentials In Files

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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