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Exploited vulnerability · CISA KEV

Is CVE-2023-45727 exploited? Yes: in CISA KEV since 3 Dec 2024

Gociux · North Grid Proself · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2023-45727, North Grid Proself Improper Restriction of XML External Entity (XXE) Reference Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Dec 2024, 412 days after it was published. It affects North Grid Proself. If you run it, CISA's required action is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 3 Dec 2024
ransomwareNot knownno confirmed use
EPSStop 10%more likely than most to be exploited
severity7.5CVSS 3.1 · high
US federal due24 Dec 2024BOD 22-01 deadline

What it is

North Grid Proself Enterprise/Standard, Gateway, and Mail Sanitize contain an improper restriction of XML External Entity (XXE) reference vulnerability, which could allow a remote, unauthenticated attacker to conduct an XXE attack.

VendorNorth Grid (1 exploited CVE in KEV)
ProductProself
VulnerabilityNorth Grid Proself Improper Restriction of XML External Entity (XXE) Reference Vulnerability
WeaknessCWE-611
Published18 Oct 2023
Added to KEV3 Dec 2024
Reported by (CNA)jpcert

What to do

  1. Check whether you run it. Look for Proself in your asset inventory, including appliances and cloud images. Stack check lists every exploited North Grid CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 18 Oct 2023.
  4. Get told next time. Email alerts when CISA adds a CVE for North Grid.

References

Questions

Is CVE-2023-45727 being exploited?

Yes. CISA added CVE-2023-45727 to the Known Exploited Vulnerabilities catalog on 3 Dec 2024, which means there is reliable evidence of exploitation in the wild.

Is CVE-2023-45727 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2023-45727?

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Check North Grid's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Proself and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in December 2024 · act-now radar.

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