CVE-2018-18751 — An issue was discovered in GNU gettext 0
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.
Published
2018-10-28T17:00:00.000Z
Last modified
2024-08-05T11:16:00.383Z
01What is this vulnerability?
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.
02Affected products
| Vendor | Product | Versions |
|---|
| n | a / n/a | n/a |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2018-10-28T17:00:00.000Z
- Last modified: 2024-08-05T11:16:00.383Z
09References
- usn.ubuntu.com — https://usn.ubuntu.com/3815-2/
- usn.ubuntu.com — https://usn.ubuntu.com/3815-1/
- github.com — https://github.com/CCCCCrash/POCs/tree/master/Bin/Tools-gettext-0.19.8.1/heapcor…
- github.com — https://github.com/CCCCCrash/POCs/tree/master/Bin/Tools-gettext-0.19.8.1/doublef…
- access.redhat.com — https://access.redhat.com/errata/RHSA-2019:3643
- lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00061.html
- lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00065.html
- lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00025.html
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