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Vulnerability details: VCID-jcnx-yyhm-aaab
Vulnerability ID VCID-jcnx-yyhm-aaab
Aliases CVE-2019-20454
Summary Out-of-bounds Read An out-of-bounds read was discovered in PCRE when the pattern \X is JIT compiled and used to match specially crafted subjects in non-UTF mode. Applications that use PCRE to parse untrusted input may be vulnerable to this flaw, which would allow an attacker to crash the application. The flaw occurs in do_extuni_no_utf in pcre2_jit_compile.c.
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-125 Out-of-bounds Read
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
generic_textual Low http://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-20454.html
rhas Moderate https://access.redhat.com/errata/RHSA-2020:3662
rhas Moderate https://access.redhat.com/errata/RHSA-2020:4539
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-20454.json
epss 0.00077 https://api.first.org/data/v1/epss?cve=CVE-2019-20454
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epss 0.00077 https://api.first.org/data/v1/epss?cve=CVE-2019-20454
epss 0.00077 https://api.first.org/data/v1/epss?cve=CVE-2019-20454
epss 0.00077 https://api.first.org/data/v1/epss?cve=CVE-2019-20454
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epss 0.00149 https://api.first.org/data/v1/epss?cve=CVE-2019-20454
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epss 0.00149 https://api.first.org/data/v1/epss?cve=CVE-2019-20454
epss 0.00154 https://api.first.org/data/v1/epss?cve=CVE-2019-20454
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20454
cvssv3.1 6.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2019-20454
cvssv3 7.5 https://nvd.nist.gov/vuln/detail/CVE-2019-20454
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2019-20454
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-20454.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-20454.json
https://api.first.org/data/v1/epss?cve=CVE-2019-20454
https://bugs.exim.org/show_bug.cgi?id=2421
https://bugs.php.net/bug.php?id=78338
https://bugzilla.redhat.com/show_bug.cgi?id=1735494
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20454
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://lists.debian.org/debian-lts-announce/2023/03/msg00014.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OQRAHYHLRNMBTPR3KXVM27NSZP3KTOPI/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OQRAHYHLRNMBTPR3KXVM27NSZP3KTOPI/
https://security.gentoo.org/glsa/202006-16
https://vcs.pcre.org/pcre2?view=revision&revision=1092
cpe:2.3:a:pcre:pcre2:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:pcre:pcre2:*:*:*:*:*:*:*:*
cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*
cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
CVE-2019-20454 https://nvd.nist.gov/vuln/detail/CVE-2019-20454
RHSA-2020:3662 https://access.redhat.com/errata/RHSA-2020:3662
RHSA-2020:4539 https://access.redhat.com/errata/RHSA-2020:4539
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-20454.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2019-20454
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2019-20454
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2019-20454
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.20238
EPSS Score 0.00077
Published At March 28, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.