7.5

CVE-2009-4492: ruby-lang webrick

Modified
AliasesGHSA-6mq2-37j5-w6r6
Published 13-01-2010Last modified 07-08-2024

Vulnerability summary

CVE-2009-4492 is a high (CVSS 7.5) vulnerability in ruby-lang webrick. EPSS estimates a 16.23% chance of exploitation in the next 30 days, higher than 96.9% of scored vulnerabilities. 4 public exploits are recorded.

Priority
Prioritiseweaponized exploit

Weaponized exploit (exploit-database, 11-01-2010)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v2.0 (NVD)
EPSS score
16.23%
0%100%
Medium · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits4reference, exploit-database

Advisory lineage

Upstream 0 · Downstream 2
RHSA-2011:0908RHSA-2011:0909

Timeline

  1. 13-01-2010
    PublishedVulnerability first disclosed.
  2. 07-08-2024
    Last modifiedVulnerability information updated.

Description

WEBrick 1.3.1 in Ruby 1.8.6 through patchlevel 383, 1.8.7 through patchlevel 248, 1.8.8dev, 1.9.1 through patchlevel 376, and 1.9.2dev 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.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

16.23%

Chance of exploitation in the next 30 days

Percentile

97%

Versus all other CVEs

30-day change

No change 0.00 pp

From 16.23% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

4 found
  • referenceUnverified

    Exploit Reference (ush.it)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (securityfocus.com)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (securitytracker.com)

    Maturity: unknown

Show all 4 exploits
  • exploit-databaseremotemultipleVerified

    Ruby 1.9.1 - WEBrick 'Terminal Escape Sequence in Logs' Command Injection

    Maturity: weaponized

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication (CVSS vector). Other conditions: not stated in public data.

Ruby-lang1 product
RubyGems1 product
  • webrick< 1.4.0

2 vendors · 2 products

References

18 links
Show all 18 references