CVE-2004-2135

Linux kernel <2.6 - Info Disclosure

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2004-2135. PoCs published by Markku-Juhani O. Saarinen.

AI-analyzed exploit summary The provided text describes an information disclosure vulnerability in cryptoloop and dm-crypt, where watermarked files may be detected on encrypted filesystems. The vulnerability does not expose file contents but reveals the presence of such files.

Description

cryptoloop on Linux kernel 2.6.x, when used on certain file systems with a block size 1024 or greater, has certain "IV computation" weaknesses that allow watermarked files to be detected without decryption.

Exploits (1)

exploitdb WRITEUP VERIFIED
by Markku-Juhani O. Saarinen · textlocallinux
https://www.exploit-db.com/exploits/25707

The provided text describes an information disclosure vulnerability in cryptoloop and dm-crypt, where watermarked files may be detected on encrypted filesystems. The vulnerability does not expose file contents but reveals the presence of such files.

Classification
Writeup 90%
Attack Type
Info Leak
Complexity
Moderate
Reliability
Theoretical
Target: cryptoloop, dm-crypt
No auth needed
Prerequisites: Access to the encrypted filesystem · Presence of watermarked files
mistral-large-3 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Various Sources x_refsource_misc
http://mareichelt.de/pub/notmine/diskenc.pdf
Exploit, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/13775
Exploit, Vendor Advisory x_refsource_misc
http://www.securiteam.com/exploits/5UP0P1PFPM.html
Mailing List mailing-list x_refsource_mlist
http://marc.info/?l=linux-kernel&m=107719798631935&w=2

Scores

EPSS 0.0122
EPSS Percentile 64.9%

Details

Status published
Products (22)
linux/linux_kernel 2.4.0 (13 CPE variants)
linux/linux_kernel 2.4.1
linux/linux_kernel 2.4.2
linux/linux_kernel 2.4.3
linux/linux_kernel 2.4.4
linux/linux_kernel 2.4.5
linux/linux_kernel 2.4.6
linux/linux_kernel 2.4.7
linux/linux_kernel 2.4.8
linux/linux_kernel 2.4.9
... and 12 more
Published May 26, 2004
Tracked Since Feb 18, 2026