CVE-2023-35845Public exploit

TLS validation disruption via world-writable certificate bundle

Published Sep 11, 2023 · Updated Sep 26, 2024

Improper certificate validation in Anaconda Distribution 2023.03-1-Linux allows local users to disrupt pip TLS validation. The Linux installer ignores umask and leaves pip's cacert.pem world-writable, allowing unprivileged accounts to alter the trusted certificate bundle. Exploitation requires local filesystem access to the installation, and tampering can interrupt pip package retrieval by causing TLS certificate checks to fail.

CVSS severity4.7
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in Anaconda Distribution 2023.03-1-Linux allows local users to disrupt pip TLS validation. The Linux installer ignores umask and leaves pip's cacert.pem world-writable, allowing unprivileged accounts to alter the trusted certificate bundle. Exploitation requires local filesystem access to the installation, and tampering can interrupt pip package retrieval by causing TLS certificate checks to fail.

The record

CVE
CVE-2023-35845
Published
Sep 11, 2023
Updated
Sep 26, 2024
Vendor
Anaconda
Product
Anaconda Distribution
Classifications
CWE-295, T1553.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2023.03-1-linux

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Anaconda · Anaconda Distributionversion=2023.03-1-linux

Published CVSS scores

4.7NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1553.004Install Root Certificate

Public exploit references

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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