The demangle_template function in cplus-dem.c in GNU libiberty, as distributed in GNU Binutils 2.31.1, has a memory leak via a crafted string, leading to a denial of service (memory consumption), as demonstrated by cxxfilt, a related issue to CVE-2018-12698.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-20657 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 | 3.3 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |
| Attack Vector | Local |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | Required |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | None |
| Availability Impact | Low |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | gcc | Affected |
| Red Hat Enterprise Linux 7 | binutils | Affected |
| Red Hat Enterprise Linux 7 | gdb | Affected |
| Red Hat Enterprise Linux 6 | gcc | Will not fix |
| Red Hat Enterprise Linux 6 | gdb | Will not fix |
| Red Hat Enterprise Linux 6 | binutils | Will not fix |
| Red Hat Enterprise Linux 5 | gcc | Will not fix |
| Red Hat Enterprise Linux 5 | gdb | Will not fix |
| Red Hat Enterprise Linux 5 | binutils | Will not fix |
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