UpHeron
All vulnerabilities

Servers and applications

CVE-2010-2023

transports/appendfile.c in Exim before 4.72, when a world-writable sticky-bit mail directory is used, does not verify the st_nlink field of mailbox files, which allows local users to cause a denial of service or possibly gain privileges by creating a hard link to another user's file.

Severity
Medium 4.4
Published
7 Jun 2010
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
0.3% in the next 30 daysHigher than 20% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Race condition (CWE-362)
Attack
Needs local access · No login needed
Attacker can
Read some data · Change some data · Slow it down
CVSS vector
AV:L/AC:M/Au:N/C:P/I:P/A:P
Sources
NVD

Affected software

SoftwareAffected versions
EximServers and applications · cpe:a:exim:exim
  • Version 4.70
  • Version 4.69
  • Version 4.68
  • Version 4.67
All 33 release lines
  • Every version up to 4.71
  • Version 4.10
  • Version 4.20
  • Version 4.21
  • Version 4.22
  • Version 4.23
  • Version 4.24
  • Version 4.30
  • Version 4.31
  • Version 4.32
  • Version 4.33
  • Version 4.34
  • Version 4.40
  • Version 4.41
  • Version 4.42
  • Version 4.43
  • Version 4.44
  • Version 4.50
  • Version 4.51
  • Version 4.52
  • Version 4.53
  • Version 4.54
  • Version 4.60
  • Version 4.61
  • Version 4.62
  • Version 4.63
  • Version 4.64
  • Version 4.65
  • Version 4.66
  • Version 4.67
  • Version 4.68
  • Version 4.69
  • Version 4.70

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2010-2023
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2010-2023