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CVE-2013-5209

Status Candidate

Overview

The sctp_send_initiate_ack function in sys/netinet/sctp_output.c in the SCTP implementation in the kernel in FreeBSD 8.3 through 9.2-PRERELEASE does not properly initialize the state-cookie data structure, which allows remote attackers to obtain sensitive information from kernel stack memory by reading packet data in INIT-ACK chunks.

Related Files

Debian Security Advisory 2743-1
Posted Aug 27, 2013
Authored by Debian | Site debian.org

Debian Linux Security Advisory 2743-1 - Several vulnerabilities have been discovered in the FreeBSD kernel that may lead to a privilege escalation or information leak.

tags | advisory, kernel, vulnerability
systems | linux, freebsd, debian
advisories | CVE-2013-3077, CVE-2013-4851, CVE-2013-5209
SHA-256 | 569d8b0cda13d3a73e841bf15e6cefd040a645974771d3bc8fc7fc5adeea0929
FreeBSD Security Advisory - sctp Kernel Memory Disclosure
Posted Aug 23, 2013
Authored by Michael Tuexen, Julian Seward | Site security.freebsd.org

FreeBSD Security Advisory - When initializing the SCTP state cookie being sent in INIT-ACK chunks, a buffer allocated from the kernel stack is not completely initialized. Fragments of kernel memory may be included in SCTP packets and transmitted over the network. For each SCTP session, there are two separate instances in which a 4-byte fragment may be transmitted. This memory might contain sensitive information, such as portions of the file cache or terminal buffers. This information might be directly useful, or it might be leveraged to obtain elevated privileges in some way. For example, a terminal buffer might include an user-entered password.

tags | advisory, kernel
systems | freebsd
advisories | CVE-2013-5209
SHA-256 | 31263b7b248f107d5f7ed98d3b388e63dc69a3862d01f93e4c9b344f9c86de7c
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