nginx 0.7.64 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's…

published 2010-01-13 16 y ago modified 2026-06-16 4 mo ago also EUVD-2009-4454

cvss: 6.8; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 26.8%; EPSS 26.8% chance of exploitation in 30 days, percentile 98%
public exploits: 1; Exploit-DB

nginx 0.7.64 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.

Patch / fix

links 1

ush.it/team/ush/hack_httpd_escape/adv.txt advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2009-4487 updated 2025-11-21 cvss 2.6

nginx: Absent sanitation of escape sequences in web server log

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

2010-01-11 First public exploit (EDB-33490)
2010-01-13 Published

Exploit prediction

26.82% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-33490 Nginx 0.7.64 - Terminal Escape Sequence in Logs Command Injection remote, 2010-01-11
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	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Technology feeds

nginx rss critical rss

References

ush.it /team/ush/hack_httpd_escape/adv.txt
exploit, patch, third-party-advisory
securityfocus.com /bid/37711
vdb-entry, broken-link, third-party-advisory
securityfocus.com /archive/1/508830/100/0/threaded
mailing-list, broken-link, third-party-advisory, vdb-entry

Sources

CVE List CVE-2009-4487
NVD CVE-2009-4487

Fencer Vulns 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.

Summary