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Fencer Intel
medium 5.0

CVE-2009-4495 json

Yaws 1.85 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's ti…

published 16y ago modified 4mo ago also EUVD-2009-4461

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
9.8%
EPSS 9.8% chance of exploitation in 30 days, percentile 95%
public exploits
1
Exploit-DB

Summary

Yaws 1.85 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.

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Timeline

  1. First public exploit (EDB-33502)
  2. Published

Exploit prediction

9.80% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-33502 Yaws 1.55 - 'Logs' Terminal Escape Sequence Command Injection remote, 2010-01-11
  • securityfocus.com http://www.securityfocus.com/bid/37716 referenced PoC, tagged "exploit" by a source, unverified
  • ush.it http://www.ush.it/team/ush/hack_httpd_escape/adv.txt referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.