CVE-2017-15874 - Integer Underflow (Wrap or Wraparound)

Severity

43%

Complexity

86%

Confidentiality

48%

archival/libarchive/decompress_unlzma.c in BusyBox 1.27.2 has an Integer Underflow that leads to a read access violation.

archival/libarchive/decompress_unlzma.c in BusyBox 1.27.2 has an Integer Underflow that leads to a read access violation.

CVSS 3.0 Base Score 5.5. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 4.3. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:P).

Demo Examples

Integer Underflow (Wrap or Wraparound)

CWE-191

The following example subtracts from a 32 bit signed integer.


               
}
return 0;

The example has an integer underflow. The value of i is already at the lowest negative value possible, so after subtracting 1, the new value of i is 2147483647.

Overview

First reported 7 years ago

2017-10-24 20:29:00

Last updated 7 years ago

2017-10-31 21:48:00

Affected Software

BusyBox 1.27.2

1.27.2

References

https://bugs.busybox.net/show_bug.cgi?id=10436

Exploit, Issue Tracking, Patch, Vendor Advisory

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