A vulnerability, which was classified as problematic, has been found in GNU screen 3.9.4/3.9.8/3.9.9/3.9.10/3.9.11. Affected by this issue is an unknown code of the component Braille Module. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Buffer overflow in the Braille module for GNU screen 3.9.11, when HAVE_BRAILLE is defined, allows local users to execute arbitrary code.

The weakness was disclosed 04/23/2002 by Gobbles as confirmed advisory (CERT.org). The advisory is shared for download at kb.cert.org. This vulnerability is handled as CVE-2002-1602 since 03/25/2005. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed in ANSI C. The exploit is available at securityfocus.com. It is declared as proof-of-concept.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at X-Force (8929).

Productinfo

Vendor

• GNU

Name

• screen

Version

• 3.9.4
• 3.9.8
• 3.9.9
• 3.9.10
• 3.9.11

License

• open-source

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CPE 2.2info

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