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OpenSSL Null-pointer assignment during SSL handshake



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General Info


TC: 12105
Description: OpenSSL is a very popular library supporting SSL and cryptographic functions working on many different platforms.

By sending a specially crafted SSL/TLS handshake to an application that uses a vulnerable OpenSSL library, a remote, unauthenticated attacker could cause OpenSSL to crash.

All versions of OpenSSL from 0.9.6c to 0.9.6l inclusive and from 0.9.7a to 0.9.7c inclusive are affected by this issue. Any application that makes use of OpenSSL's SSL/TLS library may be affected. Please contact your application vendor for details.
TC Impact: Gather Info
Service: http



Specific Operations and Actions:


Vulnerability Publication: March 17, 2004
Advisory Copyright: Stephen Henson and the OpenSSL Group
Summary: It is possible to create a DoS using a bug in OpenSSL.
Risk: Medium
CVSS 2.0 metrics: Access Vector: Network
Access Complexity: Low
Authentication: None
Confidentiality Impact: None
Integrity Impact: None
Availability Impact: Partial
CVSS 2.0 Base Score: 5.0
Vulnerability Impact: Denial of Service
Host Impact: Service can be stopped.
Nature of Remediation: Update the software.
Step required to fix the reported vulnerability:

***** Solution type: Upgrade Software *****

Upgrade to OpenSSL 0.9.7d or 0.9.6m.
Recompile any OpenSSL applications statically linked to OpenSSL libraries.

See references for more details.



Glossary and References :


References: www.sans.org/top20/
* BUGTRAQ: 20040317 New OpenSSL releases fix denial of service attacks [17 March 2004]
http://marc.theaimsgroup.com/?l=bugtraq&m=107953412903636&w=2
* CONFIRM:
http://www.openssl.org/news/secadv_20040317.txt
* CONFIRM:
http://support.avaya.com/elmodocs2/security/ASA-2005-239.htm
* CISCO: 20040317 Cisco OpenSSL Implementation Vulnerability
http://www.cisco.com/warp/public/707/cisco-sa-20040317-openssl.shtml
* APPLE: APPLE-SA-2005-08-15
http://lists.apple.com/archives/security-announce/2005/Aug/msg00000.html
* APPLE: APPLE-SA-2005-08-17
http://lists.apple.com/archives/security-announce/2005//Aug/msg00001.html
* DEBIAN: DSA-465
http://www.debian.org/security/2004/dsa-465
* FEDORA: FEDORA-2004-095
http://fedoranews.org/updates/FEDORA-2004-095.shtml
* FEDORA: FEDORA-2005-1042
http://www.redhat.com/archives/fedora-announce-list/2005-October/msg00087.html
* FREEBSD: FreeBSD-SA-04:05
ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-04:05.openssl.asc
* GENTOO: GLSA-200403-03
http://security.gentoo.org/glsa/glsa-200403-03.xml
* HP: SSRT4717
http://marc.theaimsgroup.com/?l=bugtraq&m=108403806509920&w=2
* MANDRAKE: MDKSA-2004:023
http://www.mandriva.com/security/advisories?name=MDKSA-2004:023
* NETBSD: NetBSD-SA2004-005
ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2004-005.txt.asc
* REDHAT: RHSA-2004:120
http://www.redhat.com/support/errata/RHSA-2004-120.html
* REDHAT: RHSA-2004:121
http://www.redhat.com/support/errata/RHSA-2004-121.html
* REDHAT: RHSA-2004:139
http://www.redhat.com/support/errata/RHSA-2004-139.html
* REDHAT: RHSA-2005:830
http://www.redhat.com/support/errata/RHSA-2005-830.html
* REDHAT: RHSA-2005:829
http://www.redhat.com/support/errata/RHSA-2005-829.html
* SCO: SCOSA-2004.10
ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2004.10/SCOSA-2004.10.txt
* SLACKWARE: SSA:2004-077
http://www.slackware.org/security/viewer.php?l=slackware-security&y=2004&m=slackware-security.455961
* SUSE: SuSE-SA:2004:007
http://www.novell.com/linux/security/advisories/2004_07_openssl.html
* SUNALERT: 57524
http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert/57524
* TRUSTIX: 2004-0012
http://www.trustix.org/errata/2004/0012
* CONFIRM:
http://docs.info.apple.com/article.html?artnum=61798
* CERT: TA04-078A
http://www.us-cert.gov/cas/techalerts/TA04-078A.html
* CERT-VN: VU#288574
http://www.kb.cert.org/vuls/id/288574
* CIAC: O-101
http://www.ciac.org/ciac/bulletins/o-101.shtml
* BID: 9899
http://www.securityfocus.com/bid/9899
* OVAL: oval:org.mitre.oval:def:2621
http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:2621
* OVAL: oval:org.mitre.oval:def:870
http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:870
* OVAL: oval:org.mitre.oval:def:975
http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:975
* SECUNIA: 11139
http://secunia.com/advisories/11139
* SECUNIA: 17401
http://secunia.com/advisories/17401
* SECUNIA: 17381
http://secunia.com/advisories/17381
* SECUNIA: 17398
http://secunia.com/advisories/17398
* SECUNIA: 18247
http://secunia.com/advisories/18247
* XF: openssl-dochangecipherspec-dos(15505)
http://xforce.iss.net/xforce/xfdb/15505

CVE Link: CVE-2004-0079
CVE Compatible

Glossary: Denial of Service
SSL


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