Mozilla: Out-of-bounds read and write in asm.js validation (MFSA 2015-50)
Published May 14, 2015
7.5
HIGHCVSS 2.0
EPSS 3.60%
Description
The asm.js implementation in Mozilla Firefox before 38.0 does not properly determine heap lengths during identification of cases in which bounds checking may be safely skipped, which allows remote attackers to trigger out-of-bounds write operations and possibly execute arbitrary code, or trigger out-of-bounds read operations and possibly obtain sensitive information from process memory, via crafted JavaScript.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
firefox
Not affected
Red Hat Enterprise Linux 5
thunderbird
Not affected
Red Hat Enterprise Linux 6
firefox
Not affected
Red Hat Enterprise Linux 6
thunderbird
Not affected
Red Hat Enterprise Linux 7
firefox
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 5 | thunderbird | Not affected | n/a |
| Red Hat Enterprise Linux 6 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 6 | thunderbird | Not affected | n/a |
| Red Hat Enterprise Linux 7 | firefox | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5, 6 and 7.
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 (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.60% (0.03598) | 89.08th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.74% (0.03739) | 88.40th | v5 (v2026.06.15) |
| Oct 5, 2025 | 3.88% (0.03878) | 87.76th | v4 (v2025.03.14) |
| Mar 30, 2025 | 4.99% (0.04992) | 88.70th | v4 (v2025.03.14) |
| Mar 29, 2025 | 8.79% (0.08793) | 87.33th | v4 (v2025.03.14) |
| Mar 17, 2025 | 4.99% (0.04992) | 88.97th | v4 (v2025.03.14) |
| Dec 12, 2024 | 4.15% (0.04153) | 92.51th | v3 (v2023.03.01) |
| Apr 20, 2024 | 4.13% (0.04126) | 92.07th | v3 (v2023.03.01) |
| Jan 19, 2024 | 4.74% (0.04744) | 91.87th | v3 (v2023.03.01) |
| Jun 13, 2023 | 4.47% (0.04468) | 91.22th | v3 (v2023.03.01) |
| Mar 7, 2023 | 4.37% (0.04371) | 91.06th | v3 (v2023.03.01) |
| Mar 6, 2023 | 7.78% (0.07777) | 93.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 7.78% (0.07777) | 92.60th | v2 (v2022.01.01) |
| Feb 4, 2022 | 7.78% (0.07777) | 81.54th | v2 (v2022.01.01) |
References (11)
- http://lists.opensuse.org/opensuse-updates/2015-05/msg00036.html vendor-advisoryx_refsource_SUSE
- http://www.mozilla.org/security/announce/2015/mfsa2015-50.html x_refsource_CONFIRMVendor Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html x_refsource_CONFIRM
- http://www.securityfocus.com/bid/74611 vdb-entryx_refsource_BID
- http://www.ubuntu.com/usn/USN-2602-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2015-2712 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1152280 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=1220604 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2015-2712
- https://security.gentoo.org/glsa/201605-06 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2015-2712
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-updates/2015-05/msg00036.html | vendor-advisoryx_refsource_SUSE | |
| http://www.mozilla.org/security/announce/2015/mfsa2015-50.html | x_refsource_CONFIRMVendor Advisory | |
| http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html | x_refsource_CONFIRM | |
| http://www.securityfocus.com/bid/74611 | vdb-entryx_refsource_BID | |
| http://www.ubuntu.com/usn/USN-2602-1 | vendor-advisoryx_refsource_UBUNTU | |
| https://access.redhat.com/security/cve/CVE-2015-2712 | Vendor Advisory | |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1152280 | x_refsource_CONFIRM | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1220604 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2015-2712 | ||
| https://security.gentoo.org/glsa/201605-06 | vendor-advisoryx_refsource_GENTOO | |
| https://www.cve.org/CVERecord?id=CVE-2015-2712 |
Change history (0)
No recorded changes yet.