ICU: regexp engine missing look-behind expression range check
Published Jan 22, 2015
7.5
HIGHCVSS 2.0
EPSS 2.22%
Description
The Regular Expressions package in International Components for Unicode (ICU) 52 before SVN revision 292944, as used in Google Chrome before 40.0.2214.91, allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via vectors related to a look-behind expression.
Affected products
No data.
Configuration 1
Configuration 3
- < 55.1
Configuration 4
- 7.0.5
- 8.0
Configuration 5
- 14.04
- 14.10
No data.
Supplementary for Red Hat Enterprise Linux 6
chromium-browser-0:40.0.2214.91-1.el6_6
Fixed · RHSA-2015:0093
Red Hat Enterprise Linux 5
icu
Out of support scope
Red Hat Enterprise Linux 6
icu
Out of support scope
Red Hat Enterprise Linux 7
icu
Out of support scope
| Product | Package | State | Advisory |
|---|---|---|---|
| Supplementary for Red Hat Enterprise Linux 6 | chromium-browser-0:40.0.2214.91-1.el6_6 | Fixed | RHSA-2015:0093 |
| Red Hat Enterprise Linux 5 | icu | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | icu | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | icu | Out of support scope | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
The flaw is caused because the ICU regular expression compiler is unable to properly handle certain malformed patterns. Because of the way in which this flaw manifests itself, it can only be triggered via untrusted content, which is common for components such as web browsers, in this case, the Chromium browser. This flaw has been rated moderate for ICU component in Red Hat products, because either it is very difficult to trigger this flaw, or it is unusual to directly pass untrusted parameters to the ICU library.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.22% (0.02217) | 82.02th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.22% (0.02217) | 80.27th | v5 (v2026.06.15) |
| Mar 30, 2025 | 2.28% (0.02277) | 83.19th | v4 (v2025.03.14) |
| Mar 29, 2025 | 5.59% (0.05592) | 83.45th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.28% (0.02277) | 83.51th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.79% (0.01790) | 88.58th | v3 (v2023.03.01) |
| Jul 18, 2024 | 2.10% (0.02103) | 89.28th | v3 (v2023.03.01) |
| Nov 8, 2023 | 2.09% (0.02089) | 87.84th | v3 (v2023.03.01) |
| Sep 29, 2023 | 3.87% (0.03869) | 90.85th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.97% (0.01970) | 86.92th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.36% (0.04358) | 88.02th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.36% (0.04358) | 86.83th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.36% (0.04358) | 70.59th | v2 (v2022.01.01) |
References (24)
- http://advisories.mageia.org/MGASA-2015-0047.html x_refsource_CONFIRM
- http://bugs.icu-project.org/trac/ticket/11370 x_refsource_CONFIRM
- http://googlechromereleases.blogspot.com/2015/01/stable-update.html x_refsource_CONFIRM
- http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00005.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2015-0093.html vendor-advisoryx_refsource_REDHAT
- http://secunia.com/advisories/62383 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/62575 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/62665 third-party-advisoryx_refsource_SECUNIA
- http://security.gentoo.org/glsa/glsa-201502-13.xml vendor-advisoryx_refsource_GENTOO
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html x_refsource_CONFIRM
- http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html x_refsource_CONFIRM
- http://www.securityfocus.com/bid/72288 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1031623 vdb-entryx_refsource_SECTRACK
- http://www.ubuntu.com/usn/USN-2476-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2014-7923 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1185202 Issue Tracking
- https://chromium.googlesource.com/chromium/deps/icu52/+/3af4ce5982311035e5f36803d547c0befa576c8c x_refsource_CONFIRM
- https://chromium.googlesource.com/chromium/deps/icu52/+/6242e2fbb36f486f2c0addd1c3cef67fc4ed33fb x_refsource_CONFIRM
- https://code.google.com/p/chromium/issues/detail?id=430353 x_refsource_CONFIRM
- https://codereview.chromium.org/726973003 x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2014-7923
- https://security.gentoo.org/glsa/201503-06 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2014-7923
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html x_refsource_MISC
Change history (0)
No recorded changes yet.