The d_print_comp function in cp-demangle.c in libiberty allows remote attackers to cause a denial of service (segmentation fault and crash) via a crafted binary, which triggers infinite recursion and a buffer overflow, related to a node having "itself as ancestor more than once."
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2016-4491 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 0 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N |
| Attack Vector | Local |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | None |
| Availability Impact | None |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | gcc | Will not fix |
| Red Hat Enterprise Linux 7 | compat-gcc-44 | Will not fix |
| Red Hat Enterprise Linux 7 | compat-gcc-34 | Will not fix |
| Red Hat Enterprise Linux 7 | compat-gcc-32 | Will not fix |
| Red Hat Enterprise Linux 7 | binutils | Will not fix |
| Red Hat Enterprise Linux 7 | gdb | Will not fix |
| Red Hat Enterprise Linux 6 | gcc | Will not fix |
| Red Hat Enterprise Linux 6 | compat-gcc-296 | Will not fix |
| Red Hat Enterprise Linux 6 | compat-gcc-295 | Will not fix |
| Red Hat Enterprise Linux 6 | binutils | Will not fix |
| Red Hat Enterprise Linux 6 | gdb | Will not fix |
| Red Hat Enterprise Linux 6 | compat-gcc-32 | Will not fix |
| Red Hat Enterprise Linux 6 | compat-gcc-34 | Will not fix |
| Red Hat Enterprise Linux 5 | binutils | Will not fix |
| Red Hat Enterprise Linux 5 | gdb | Will not fix |
| Red Hat Enterprise Linux 5 | gcc44 | Will not fix |
| Red Hat Enterprise Linux 5 | gcc | Will not fix |
| Red Hat Enterprise Linux 5 | binutils220 | Will not fix |
| Red Hat Enterprise Linux 5 | compat-gcc-34 | Will not fix |
| Red Hat Enterprise Linux 5 | compat-gcc-32 | Will not fix |
| Red Hat Enterprise Linux 5 | compat-gcc-296 | Will not fix |
| Red Hat Enterprise Linux 5 | compat-gcc-295 | Will not fix |
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