Out-of-bounds write in libtASN1 - CVE-2006-0645
Published: April 30, 2026
Vulnerability identifier: #VU128533
CSH Severity: Critical
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Red
CVE-ID: CVE-2006-0645
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GNU
Affected software:
libtASN1
libtASN1
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in DER decoder when processing SSL traffic. A remote attacker can send specially crafted packets to the application, trigger an out-of-bounds write and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2006-0645
Install updates from vendor's website.
Sources
- http://josefsson.org/cgi-bin/viewcvs.cgi/gnutls/tests/certder.c?view=markup
- http://josefsson.org/cgi-bin/viewcvs.cgi/libtasn1/NEWS?root=gnupg-mirror&view=markup
- http://josefsson.org/gnutls/releases/libtasn1/libtasn1-0.2.18-from-0.2.17.patch
- http://lists.gnupg.org/pipermail/gnutls-dev/2006-February/001058.html
- http://lists.gnupg.org/pipermail/gnutls-dev/2006-February/001059.html
- http://lists.gnupg.org/pipermail/gnutls-dev/2006-February/001060.html