CVE-2019-20454

An out-of-bounds read was discovered in PCRE before 10.34 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.

CVSS v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://bugs.php.net/bug.php?id=78338	Exploit Issue Tracking Third Party Advisory
https://bugs.exim.org/show_bug.cgi?id=2421	Issue Tracking Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1735494	Issue Tracking Patch
https://vcs.pcre.org/pcre2?view=revision&revision=1092	Patch
https://security.gentoo.org/glsa/202006-16
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OQRAHYHLRNMBTPR3KXVM27NSZP3KTOPI/

Configurations

Configuration 1 (hide)

cpe:2.3:a:pcre:pcre2:*:*:*:*:*:*:*:*

Information

Published : 2020-02-14 14:15

Updated : 2020-07-09 03:15

NVD link : CVE-2019-20454

Mitre link : CVE-2019-20454

JSON object : View

Products Affected

pcre

pcre2

CWE

CWE-125

Out-of-bounds Read

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