CVE-2016-1925 - Integer Underflow (Wrap or Wraparound)

Severity

75%

Complexity

99%

Confidentiality

106%

Integer underflow in header.c in lha allows remote attackers to have unspecified impact via a large header size value for the (1) level0 or (2) level1 header in a lha archive, which triggers a buffer overflow.

CVSS 3.0 Base Score 9.8. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:P/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 8 years ago

2017-01-23 21:59:00

Last updated 8 years ago

2017-01-24 22:21:00

Affected Software

LHa For UNIX Project LHa For UNIX

References

[oss-security] 20160118 Buffer Overflow in lha compression utility

Mailing List, Third Party Advisory

[oss-security] 20160118 Re: Buffer Overflow in lha compression utility