CVE-2006-5974: fetchmail Improper Input Validation
Vulnerability summary
CVE-2006-5974 is a high (CVSS 7.8) Improper Input Validation vulnerability in fetchmail. EPSS estimates a 4.01% chance of exploitation in the next 30 days, higher than 90.5% of scored vulnerabilities.
Not severe (CVSS 7.8, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 09-01-2007PublishedVulnerability first disclosed.
- 07-08-2024Last modifiedVulnerability information updated.
Description
fetchmail 6.3.5 and 6.3.6 before 6.3.6-rc4, when refusing a message delivered via the mda option, allows remote attackers to cause a denial of service (crash) via unknown vectors that trigger a NULL pointer dereference when calling the (1) ferror or (2) fflush functions.
CVSS metrics
1 score · 1 source · 1 versionEPSS trend
Probability
4.01%
Chance of exploitation in the next 30 days
Percentile
91%
Versus all other CVEs
30-day change
Increase +0.10 pp
From 3.91% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- fetchmail< 6.3.6-1
Fetchmail1 product
- fetchmail6.3.5 | 6.3.6:rc1 | 6.3.6:rc2 | 6.3.6:rc3
2 vendors · 2 products
References
19 links- slackware.com/security/viewer.php?l=slackware-security&y=2007&m=slackware-security.517995Vendor AdvisoryX Refsource SLACKWARE
- fetchmail.berlios.de/fetchmail-SA-2006-03.txtX Refsource CONFIRM
