CVE-2019-20454
Published: 14 February 2020
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.
Priority
Status
Package | Release | Status |
---|---|---|
pcre2 Launchpad, Ubuntu, Debian |
bionic |
Needed
|
eoan |
Ignored
(end of life)
|
|
focal |
Not vulnerable
(10.34-7)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(10.34-1)
|
|
xenial |
Not vulnerable
(code not present)
|
|
groovy |
Not vulnerable
(10.34-7)
|
|
hirsute |
Not vulnerable
(10.34-7)
|
|
impish |
Not vulnerable
(10.34-7)
|
|
jammy |
Not vulnerable
(10.34-7)
|
|
kinetic |
Not vulnerable
(10.34-7)
|
|
lunar |
Not vulnerable
(10.34-7)
|
|
mantic |
Not vulnerable
(10.34-7)
|
|
Patches: upstream: https://vcs.pcre.org/pcre2?view=revision&revision=1092 upstream: https://vcs.pcre.org/pcre2?view=revision&revision=1091 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |