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Fencer Vulns
critical 9.3

CVE-2008-1801 in the critical feed json

Integer underflow in the iso_recv_msg function (iso.c) in rdesktop 1.5.0 allows remote attackers to cause a denial of service (crash) and p…

published 2008-05-12 18 y ago modified 2026-06-16 4 mo ago also EUVD-2008-1801

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
13.1%
EPSS 13.1% chance of exploitation in 30 days, percentile 96%
public exploits
1
Exploit-DB

Summary

Integer underflow in the iso_recv_msg function (iso.c) in rdesktop 1.5.0 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a Remote Desktop Protocol (RDP) request with a small length field.

Patch / fix

  • rdesktop Debian 14, Debian 13, Debian 12 1.5.0-4+cvs20071006

debian advisories DEBIAN-CVE-2008-1801

  • rdesktop RHEL 5 1.4.1-6
  • rdesktop RHEL 4 1.3.1-9
  • rdesktop RHEL 3 1.2.0-3

red hat advisories RHSA-2008:0575RHSA-2008:0725RHSA-2008:0576

  • rdesktop openSUSE Tumbleweed 1.9.0-4.6

opensuse advisories openSUSE-SU-2024:11298-1

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-2008-1801 updated cvss 5.4

rdesktop: iso_recv_msg() Integer Underflow Vulnerability

  • Red Hat Desktop version 3 rdesktop 1.2.0-3
    fixed: vendor fix RHSA-2008:0576
  • Red Hat Enterprise Linux (v. 5 server) rdesktop 1.4.1-6
    fixed: vendor fix RHSA-2008:0575
  • Red Hat Enterprise Linux AS version 3 rdesktop 1.2.0-3
    fixed: vendor fix RHSA-2008:0576
  • Red Hat Enterprise Linux AS version 4 rdesktop 1.3.1-9
    fixed: vendor fix RHSA-2008:0725
  • Red Hat Enterprise Linux Desktop (v. 5 client) rdesktop 1.4.1-6
    fixed: vendor fix RHSA-2008:0575
  • Red Hat Enterprise Linux Desktop version 4 rdesktop 1.3.1-9
    fixed: vendor fix RHSA-2008:0725
  • Red Hat Enterprise Linux ES version 3 rdesktop 1.2.0-3
    fixed: vendor fix RHSA-2008:0576
  • Red Hat Enterprise Linux ES version 4 rdesktop 1.3.1-9
    fixed: vendor fix RHSA-2008:0725
show 2 more
  • Red Hat Enterprise Linux WS version 3 rdesktop 1.2.0-3
    fixed: vendor fix RHSA-2008:0576
  • Red Hat Enterprise Linux WS version 4 rdesktop 1.3.1-9
    fixed: vendor fix RHSA-2008:0725

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

  1. First public exploit (EDB-5561)
  2. Published

Exploit prediction

13.13% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-5561 rdesktop 1.5.0 - 'iso_recv_msg()' Integer Underflow (PoC) dos, 2008-05-08
  • rdesktop.cvs.sourceforge.net http://rdesktop.cvs.sourceforge.net/rdesktop/rdesktop/iso.c?r1=1.19&r2=1.20&pathrev=HEAD referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness

References

Sources

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.