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Apple Terminal xterm Resize Escape Sequence Memory Corruption Vulnerability

TPTI-09-04: June 2nd, 2009

CVE ID

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 8152. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple Terminal. User interaction is required to exploit this vulnerability in that the target must visit a malicious page.

The specific flaw exists in the handling of 'CSI[4' xterm window resizing escape code. When a very low negative value for (x, y) size is set, an integer overflow occurs resulting in a memory corruption. This can be further leveraged to execute arbitrary code under the context of the logged in user.

Vendor Response

Apple has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2009-05-06 - Vulnerability reported to vendor
    2009-06-02 - Coordinated public release of advisory

Credit

This vulnerability was discovered by: