CVE-2018-18751
9.8
CRITICAL · CVSS 3.0 · EPSS 4.3% (pctl 91)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 4.26% — more likely to be exploited than 91% of all CVEs |
| Weakness | CWE-415 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2018-10-29 |
| Last modified | 2026-06-17 |
Affected (3)
| Vendor | Product |
|---|---|
| canonical | ubuntu linux |
| gnu | gettext |
| redhat | enterprise linux |
References
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00061.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00065.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00025.html
- https://access.redhat.com/errata/RHSA-2019:3643
- https://github.com/CCCCCrash/POCs/tree/master/Bin/Tools-gettext-0.19.8.1/doublefree
- https://github.com/CCCCCrash/POCs/tree/master/Bin/Tools-gettext-0.19.8.1/heapcorruption
- https://usn.ubuntu.com/3815-1/
- https://usn.ubuntu.com/3815-2/
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00061.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00065.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00025.html
- https://access.redhat.com/errata/RHSA-2019:3643
- https://github.com/CCCCCrash/POCs/tree/master/Bin/Tools-gettext-0.19.8.1/doublefree
- https://github.com/CCCCCrash/POCs/tree/master/Bin/Tools-gettext-0.19.8.1/heapcorruption
- https://usn.ubuntu.com/3815-1/
- https://usn.ubuntu.com/3815-2/
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