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Vigil@nce: Linux kernel, denial of service via rtl8169

December 2009 by Vigil@nce

SYNTHESIS OF THE VULNERABILITY

An attacker can use a memory leak of the rtl8169 driver, in order to generate a denial of service.

Severity: 2/4

Consequences: denial of service of computer

Provenance: LAN

Means of attack: 1 attack

Ability of attacker: technician (2/4)

Confidence: confirmed by the editor (5/5)

Diffusion of the vulnerable configuration: high (3/3)

Creation date: 16/12/2009

IMPACTED PRODUCTS
- Debian Linux
- Linux kernel
- Red Hat Enterprise Linux
- SUSE Linux Enterprise Server

DESCRIPTION OF THE VULNERABILITY

The rtl8169 driver implements the support of network adapters of the Realtek RTL81xx suite. These adapters can receive Ethernet frames with a size of 16383 bytes (jumbo frames).

However, the rtl8169_rx_interrupt() and rtl8169_start_xmit() functions of the drivers/net/r8169.c file do not free the memory used by large frames.

An attacker located on a network supporting jumbo frames can therefore send numerous frames in order to generate a denial of service.

CHARACTERISTICS

Identifiers: BID-36706, CVE-2009-3613, DSA 1915-1, DSA 1928-1, RHSA-2009:1540-01, RHSA-2009:1548-01, RHSA-2009:1671-01, SUSE-SA:2009:064, VIGILANCE-VUL-9293

http://vigilance.fr/vulnerability/L...




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