SB2017051819 - Multiple vulnerabilities in libdwarf

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2017-9053)

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

An issue, also known as DW201703-005, was discovered in libdwarf 2017-03-21. A heap-based buffer over-read in _dwarf_read_loc_expr_op() is due to a failure to check a pointer for being in bounds (in a few places in this function).

2) Out-of-bounds read (CVE-ID: CVE-2017-9054)

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

An issue, also known as DW201703-002, was discovered in libdwarf 2017-03-21. In _dwarf_decode_s_leb128_chk() a byte pointer was dereferenced just before it was checked for being in bounds, leading to a heap-based buffer over-read.

3) Out-of-bounds read (CVE-ID: CVE-2017-9055)

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

An issue, also known as DW201703-001, was discovered in libdwarf 2017-03-21. In dwarf_formsdata() a few data types were not checked for being in bounds, leading to a heap-based buffer over-read.

Remediation

Install update from vendor's website.

References

• https://www.prevanders.net/dwarfbug.html