ID CVE-2018-8795
Summary rdesktop versions up to and including v1.8.3 contain an Integer Overflow that leads to a Heap-Based Buffer Overflow in function process_bitmap_updates() and results in a memory corruption and probably even a remote code execution.
References
Vulnerable Configurations
  • rdesktop 1.8.3
    cpe:2.3:a:rdesktop:rdesktop:1.8.3
  • Debian Linux 8.0 (Jessie)
    cpe:2.3:o:debian:debian_linux:8.0
  • Debian Linux 9.0
    cpe:2.3:o:debian:debian_linux:9.0
CVSS
Base: 7.5
Impact:
Exploitability:
CWE CWE-190
CAPEC
  • Forced Integer Overflow
    This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.
nessus via4
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2019-5146CD34E2.NASL
    description Update to 1.8.4. Security fix for CVE-2018-8794 CVE-2018-8795 CVE-2018-8797 CVE-2018-20175 CVE-2018-20176 CVE-2018-8791 CVE-2018-8792 CVE-2018-8793 CVE-2018-8796 CVE-2018-8798 CVE-2018-8799 CVE-2018-8800 CVE-2018-20174 CVE-2018-20177 CVE-2018-20178 CVE-2018-20179 CVE-2018-20180 CVE-2018-20181 CVE-2018-20182. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2019-02-13
    plugin id 122134
    published 2019-02-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=122134
    title Fedora 28 : rdesktop (2019-5146cd34e2)
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DLA-1683.NASL
    description Multiple security issues were found in the rdesktop RDP client, which could result in denial of service, information disclosure and the execution of arbitrary code. For Debian 8 'Jessie', these problems have been fixed in version 1.8.4-0+deb8u1. We recommend that you upgrade your rdesktop packages. NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2019-02-20
    plugin id 122318
    published 2019-02-20
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=122318
    title Debian DLA-1683-1 : rdesktop security update
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DSA-4394.NASL
    description Multiple security issues were found in the rdesktop RDP client, which could result in denial of service, information disclosure and the execution of arbitrary code.
    last seen 2019-02-21
    modified 2019-02-19
    plugin id 122271
    published 2019-02-19
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=122271
    title Debian DSA-4394-1 : rdesktop - security update
refmap via4
bid 106938
confirm https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/
debian DSA-4394
gentoo GLSA-201903-06
misc https://github.com/rdesktop/rdesktop/commit/4dca546d04321a610c1835010b5dad85163b65e1
mlist [debian-lts-announce] 20190219 [SECURITY] [DLA 1683-1] rdesktop security update
Last major update 05-02-2019 - 15:29
Published 05-02-2019 - 15:29
Last modified 11-03-2019 - 11:19
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