What’s Vulnerable › Vulnerabilities

CVE-2018-18751

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-10-29 · updated 2026-06-17
• Weakness: CWE-415

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.

Affected products

• Canonical Ubuntu Linux: 12.04, 14.04, 16.04, 18.04, 18.10
• GNU Gettext: 0.19.8
• Red Hat Enterprise Linux: 7.0

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

Get alerted when CVE-2018-18751 or the next vulnerability affects your stack