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    CVE-2018-20969

    do_ed_script in pch.c in GNU patch through 2.7.6 does not block strings beginning with a ! character. NOTE: this is the same commit as for CVE-2019-13638, but the ! syntax is specific to ed, and is unrelated to a shell metacharacter.

    Published:Aug 16, 2019
    Last Modified:Nov 21, 2024
    EPS:Aug 16, 2019
    EPSS Score:0.0071
    CVSS Score:7.8

    Affected Products

    Vendor
    Gnu
    Product
    Patch
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Tus

    Exploits

    https://seclists.org/bugtraq/2019/Aug/29https://seclists.org/bugtraq/2019/Aug/29

    Related CVEs

    CVE-2026-56289 (CVSS 4.6) — GNU patch is vulnerable to a denial of service (DoS) due to improper validation of hunk (single block of chang…
    CVE-2026-56288 (CVSS 4.6) — GNU patch is vulnerable to a NULL pointer dereference when processing a specially crafted unified-diff patch f…
    CVE-2021-45261 (CVSS 5.5) — An Invalid Pointer vulnerability exists in GNU patch 2.7 via the another_hunk function, which causes a Denial …
    CVE-2019-20633 (CVSS 5.5) — GNU patch through 2.7.6 contains a free(p_line[p_end]) Double Free vulnerability in the function another_hunk …
    CVE-2019-13638 (CVSS 7.8) — GNU patch through 2.7.6 is vulnerable to OS shell command injection that can be exploited by opening a crafted…
    CVE-2019-13636 (CVSS 5.9) — In GNU patch through 2.7.6, the following of symlinks is mishandled in certain cases other than input files. T…
    CVE-2018-1000156 (CVSS 7.8) — GNU Patch version 2.7.6 contains an input validation vulnerability when processing patch files, specifically t…
    CVE-2016-10713 (CVSS 5.5) — An issue was discovered in GNU patch before 2.7.6. Out-of-bounds access within pch_write_line() in pch.c can p…
    CVE-2018-6952 (CVSS 7.5) — A double free exists in the another_hunk function in pch.c in GNU patch through 2.7.6.…
    CVE-2018-6951 (CVSS 7.5) — An issue was discovered in GNU patch through 2.7.6. There is a segmentation fault, associated with a NULL poin…

    References

    http://packetstormsecurity.com/files/154124/GNU-patch-Command-Injection-Directory-Traversal.html
    https://access.redhat.com/errata/RHSA-2019:2798
    https://access.redhat.com/errata/RHSA-2019:2964
    https://access.redhat.com/errata/RHSA-2019:3757
    https://access.redhat.com/errata/RHSA-2019:3758
    https://access.redhat.com/errata/RHSA-2019:4061
    https://git.savannah.gnu.org/cgit/patch.git/commit/?id=3fcd042d26d70856e826a42b5f93dc4854d80bf0
    https://github.com/irsl/gnu-patch-vulnerabilities
    https://seclists.org/bugtraq/2019/Aug/29
    http://packetstormsecurity.com/files/154124/GNU-patch-Command-Injection-Directory-Traversal.html
    https://access.redhat.com/errata/RHSA-2019:2798
    https://access.redhat.com/errata/RHSA-2019:2964
    https://access.redhat.com/errata/RHSA-2019:3757
    https://access.redhat.com/errata/RHSA-2019:3758
    https://access.redhat.com/errata/RHSA-2019:4061
    https://git.savannah.gnu.org/cgit/patch.git/commit/?id=3fcd042d26d70856e826a42b5f93dc4854d80bf0
    https://github.com/irsl/gnu-patch-vulnerabilities
    https://seclists.org/bugtraq/2019/Aug/29

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