CVE-2023-7279Network attack vector

Admission validation hang via nested delegation regex

Published Sep 2, 2024 · Updated Sep 3, 2024

ReDoS in Connaisseur 3.3.0 and earlier allows man-in-the-middle attackers to hang admission validation via a Notary response. The targets.json schema applies a nested quantified regex to delegation names, letting malformed names cause exponential backtracking. Reachability requires a notaryv1 validator and control of Notary responses; the default configuration includes such validators.

CVSS severity2.1
Low
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

ReDoS in Connaisseur 3.3.0 and earlier allows man-in-the-middle attackers to hang admission validation via a Notary response. The targets.json schema applies a nested quantified regex to delegation names, letting malformed names cause exponential backtracking. Reachability requires a notaryv1 validator and control of Notary responses; the default configuration includes such validators.

The record

CVE
CVE-2023-7279
Published
Sep 2, 2024
Updated
Sep 3, 2024
Vendor
SSE - Secure Systems Engineering GmbH
Product
Connaisseur
Classifications
CWE-1333, T1499
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=3.0
  2. Affected versionversion=3.1
  3. Affected versionversion=3.2
  4. Affected versionversion=3.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

SSE - Secure Systems Engineering GmbH · Connaisseurversion=3.0; version=3.1; version=3.2; version=3.3

Published CVSS scores

5.9NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
2.6VulDBCVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
2.1VulDBCVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
2.6VulDBCVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
1.4VulDBAV:A/AC:H/Au:S/C:N/I:N/A:P

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-1333Inefficient Regular Expression Complexity
T1499Endpoint Denial of Service

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo