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Debian Security Advisory 2368-1

Debian Security Advisory 2368-1
Posted Dec 21, 2011
Authored by Debian | Site debian.org

Debian Linux Security Advisory 2368-1 - Several vulnerabilities have been discovered in lighttpd, a small and fast webserver with minimal memory footprint.

tags | advisory, vulnerability
systems | linux, debian
advisories | CVE-2011-4362, CVE-2011-3389
SHA-256 | f07a24700e2eeea7198aeaf2eec0970239a3a34b71aaa8f180afb3e0a6490a33

Debian Security Advisory 2368-1

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- ---------------------------------------------------------------------------
Debian Security Advisory DSA-2368-1 security@debian.org
http://www.debian.org/security/ Nico Golde
Dec 20th, 2011 http://www.debian.org/security/faq
- ---------------------------------------------------------------------------

Package : lighttpd
Vulnerability : multiple
Problem type : remote
Debian-specific: no
Debian bug : 652726
CVE IDs : CVE-2011-4362 CVE-2011-3389

Several vulnerabilities have been discovered in lighttpd, a small and fast
webserver with minimal memory footprint.

CVE-2011-4362

Xi Wang discovered that the base64 decoding routine which is used to
decode user input during an HTTP authentication, suffers of a signedness
issue when processing user input. As a result it is possible to force
lighttpd to perform an out-of-bounds read which results in Denial of
Service conditions.

CVE-2011-3389

When using CBC ciphers on an SSL enabled virtual host to communicate with
certain client, a so called "BEAST" attack allows man-in-the-middle
attackers to obtain plaintext HTTP traffic via a blockwise
chosen-boundary attack (BCBA) on an HTTPS session. Technically this is
no lighttpd vulnerability. However, lighttpd offers a workaround to
mitigate this problem by providing a possibility to disable CBC ciphers.

This updates includes this option by default. System administrators
are advised to read the NEWS file of this update (as this may break older
clients).


For the oldstable distribution (lenny), this problem has been fixed in
version 1.4.19+lenny3.

For the stable distribution (squeeze), this problem has been fixed in
version 1.4.28-2+squeeze1.

For the testing distribution (squeeze), this problem will be fixed soon.

For the unstable distribution (sid), this problem has been fixed in
version 1.4.30-1.


We recommend that you upgrade your lighttpd packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org

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