An issue was discovered in GNU gettext 0.19.8. There is a double free in default_add_message in read-catalog.c, related to an invalid free in po_gram_parse in po-gram-gen.y, as demonstrated by lt-msgfmt.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-18751 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue affects the versions of gettext as shipped with Red Hat Enterprise Linux 7.
This issue did not affect the versions of gettext as shipped with Red Hat Enterprise Linux 5 and 6.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 4 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| Attack Vector | Local |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | None |
| Availability Impact | Low |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | gettext | Affected |
| Red Hat Enterprise Linux 6 | gettext | Not affected |
| Red Hat Enterprise Linux 5 | gettext | Not affected |
Vulmon