CVE Tools
Track your stack

CVE-2003-0743

No known exploitation. EPSS puts it in the 93rd percentile. A vendor fix is available.

CVSS 2.07.5HighEPSS percentile93rd5.7% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFixVendor fixNo build named by the sources

Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

The vendor has published a fix. Version details are below where the sources state them.

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

Heap-based buffer overflow in smtp_in.c for Exim 3 (exim3) before 3.36 and Exim 4 (exim4) before 4.21 may allow remote attackers to execute arbitrary code via an invalid (1) HELO or (2) EHLO argument with a large number of spaces followed by a NULL character and a newline, which is not properly trimmed before the "(no argument given)" string is appended to the buffer.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS93rd
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

5.7% chance of exploitation activity in the next 30 days, which ranks it in the 93rd percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

5 events over 8328 days, from the signal feeds we watch.

  1. OpenVAS check added
  2. Patch availablerecord updated
  3. Publishedweakness classified

Affected products

And 1 more affected product. See all after sign-in

Technical detail

CVSS 2.0 vector

Open in the CVSS calculator

AV:N/AC:L/Au:N/C:P/I:P/A:P

Scored 7.5 by NVD.

How it is reached

  • Access Vector NetworkExploitable remotely over the network
  • Access Complexity LowNo special conditions required
  • Authentication NoneNo authentication required

Impact if exploited

  • Confidentiality PartialSome information is disclosed
  • Integrity PartialSome data can be modified
  • Availability PartialReduced performance or service disruption

Weaknesses

Sources

References in the record

And 6 more references. See all after sign-in

Watch the software you run.

My Stack ranks new CVEs for your products by real-world exploitation, so the next serious one reaches you without reading every advisory.

We'll flag the next CVE, public exploit or patch for Exim, not every advisory.

We use analytics cookies to see which pages and articles actually help people. Decline and none of them run — the site works the same. What we store