Debian Security Advisory

DSA-136-1 openssl -- multiple remote exploits

Date Reported:
30 Jul 2002
Affected Packages:
Security database references:
In the Bugtraq database (at SecurityFocus): BugTraq ID 5362, BugTraq ID 5363, BugTraq ID 5366, BugTraq ID 5353, BugTraq ID 5364, BugTraq ID 5361.
In Mitre's CVE dictionary: CVE-2002-0655, CVE-2002-0656, CVE-2002-0657, CVE-2002-0659.
CERT's vulnerabilities, advisories and incident notes: CA-2002-23, CA-2002-27.
More information:

The OpenSSL development team has announced that a security audit by A.L. Digital Ltd and The Bunker, under the DARPA CHATS program, has revealed remotely exploitable buffer overflow conditions in the OpenSSL code. Additionally, the ASN1 parser in OpenSSL has a potential DoS attack independently discovered by Adi Stav and James Yonan.

CAN-2002-0655 references overflows in buffers used to hold ASCII representations of integers on 64 bit platforms. CAN-2002-0656 references buffer overflows in the SSL2 server implementation (by sending an invalid key to the server) and the SSL3 client implementation (by sending a large session id to the client). The SSL2 issue was also noticed by Neohapsis, who have privately demonstrated exploit code for this issue. CAN-2002-0659 references the ASN1 parser DoS issue.

These vulnerabilities have been addressed for Debian 3.0 (woody) in openssl094_0.9.4-6.woody.2, openssl095_0.9.5a-6.woody.1 and openssl_0.9.6c-2.woody.1.

These vulnerabilities are also present in Debian 2.2 (potato). Fixed packages are available in openssl094_0.9.4-6.potato.2 and openssl_0.9.6c-0.potato.4.

A worm is actively exploiting this issue on internet-attached hosts; we recommend you upgrade your OpenSSL as soon as possible. Note that you must restart any daemons using SSL. (E.g., ssh or ssl-enabled apache.) If you are uncertain which programs are using SSL you may choose to reboot to ensure that all running daemons are using the new libraries.

Fixed in:

Debian GNU/Linux 2.2 (potato)

Architecture-independent component:
Intel IA-32:
Motorola 680x0:
Sun Sparc:

Debian GNU/Linux 3.0 (woody)

HP Precision:
Intel IA-32:
Intel IA-64:
Motorola 680x0
Big endian MIPS:
Little endian MIPS:
s390 (IBM S/390):
Sun Sparc:

MD5 checksums of the listed files are available in the original advisory.

MD5 checksums of the listed files are available in the revised advisory.

MD5 checksums of the listed files are available in the revised advisory.