OpenSSL: Multiple vulnerabilities
1.
Gentoo Linux Security Advisory
Version Information
| Advisory Reference |
GLSA 200912-01 / openssl |
| Release Date |
December 01, 2009 |
| Latest Revision |
December 02, 2009: 02 |
| Impact |
normal |
| Exploitable |
remote |
| Package |
Vulnerable versions |
Unaffected versions |
Architecture(s) |
| dev-libs/openssl |
<
0.9.8l-r2 |
>=
0.9.8l-r2 |
All supported architectures
|
Related bugreports:
#270305, #280591, #292022
Synopsis
Multiple vulnerabilities in OpenSSL might allow remote attackers to conduct
multiple attacks, including the injection of arbitrary data into encrypted
byte streams.
2.
Impact Information
Background
OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer
(SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general
purpose cryptography library.
Description
Multiple vulnerabilities have been reported in OpenSSL:
- Marsh Ray of PhoneFactor and Martin Rex of SAP independently
reported that the TLS protocol does not properly handle session
renegotiation requests (CVE-2009-3555).
- The MD2 hash algorithm is no longer considered to be
cryptographically strong, as demonstrated by Dan Kaminsky. Certificates
using this algorithm are no longer accepted (CVE-2009-2409).
- Daniel Mentz and Robin Seggelmann reported the following
vulnerabilities related to DTLS: A use-after-free flaw (CVE-2009-1379)
and a NULL pointer dereference (CVE-2009-1387) in the
dtls1_retrieve_buffered_fragment() function in src/d1_both.c, multiple
memory leaks in the dtls1_process_out_of_seq_message() function in
src/d1_both.c (CVE-2009-1378), and a processing error related to a
large amount of DTLS records with a future epoch in the
dtls1_buffer_record() function in ssl/d1_pkt.c
(CVE-2009-1377).
Impact
A remote unauthenticated attacker, acting as a Man in the Middle, could
inject arbitrary plain text into a TLS session, possibly leading to the
ability to send requests as if authenticated as the victim. A remote
attacker could furthermore send specially crafted DTLS packages to a
service using OpenSSL for DTLS support, possibly resulting in a Denial
of Service. Also, a remote attacker might be able to create rogue
certificates, facilitated by a MD2 collision. NOTE: The amount of
computation needed for this attack is still very large.
3.
Resolution Information
Workaround
There is no known workaround at this time.
Resolution
All OpenSSL users should upgrade to the latest version:
Code Listing 3.1: Resolution |
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/openssl-0.9.8l-r2"
|
4.
References
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