A vulnerability was found in Rxvt 2.7.10. It has been declared as problematic. Affected by this vulnerability is an unknown function of the component Terminal Escape Code Handler. The manipulation with the input value -2^31 leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability. The summary by CVE is:

Rxvt 2.7.10 is vulnerable to a denial of service attack by passing the value -2^31 inside a terminal escape code, which results in a non-invertible integer that eventually leads to a segfault due to an out of bounds read.

The bug was discovered 05/01/2017. The weakness was disclosed 05/02/2017 (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is known as CVE-2017-7483 since 04/05/2017. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 100715 (openSUSE Security Update : rxvt-unicode (openSUSE-2017-670)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l.

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (100715).

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• Rxvt

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• 2.7.10

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