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CVE-2015-4493· NVD / CVE Program· CNA mozilla

Heap-based buffer overflow in the stagefright::ESDS::parseESDescriptor function in libstagefright in Mozilla Firefox before 40.0 and Firefox

Noroxi assessment

Priority: Monitor (action score 39/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 7.3% (FIRST EPSS); higher than 94.3% of all records.
  • Fixed version: iceweasel (Debian:7) 38.2.0esr-1~deb7u1; iceweasel (Debian:8) 38.2.0esr-1~deb8u1; firefox (Red Hat:enterprise_linux:5::client) 0:38.2.0-4.el5_11.

Low priority for now. Upgrade to iceweasel (Debian:7) 38.2.0esr-1~deb7u1; iceweasel (Debian:8) 38.2.0esr-1~deb8u1; firefox (Red Hat:enterprise_linux:5::client) 0:38.2.0-4.el5_11 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Heap-based buffer overflow in the stagefright::ESDS::parseESDescriptor function in libstagefright in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 allows remote attackers to execute arbitrary code via an invalid size field in an esds chunk in MPEG-4 video data, a related issue to CVE-2015-1539.

CriticalCVSS 9.3 · v2.0—No exploit Fix available
Published
Aug 15, 2015
Updated
Jun 16, 2026
EPSS
7.3% · 94th percentile

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
37 / 40 · 9.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
2 / 30 · 7.3%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
mozillafirefox
oraclesolaris
canonicalubuntu linux
opensuseopensuse

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • canonical ubuntu linux12.04
  • canonical ubuntu linux14.04
  • canonical ubuntu linux15.04
  • mozilla firefoxup to 39.0.3 inclusive
  • mozilla firefox38.0
  • mozilla firefox38.0.1
  • mozilla firefox38.0.5
  • mozilla firefox38.1.0
  • opensuse opensuse13.1
  • opensuse opensuse13.2
  • oracle solaris11.3

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:7iceweaselbefore 38.2.0esr-1~deb7u138.2.0esr-1~deb7u1
Debian:8iceweaselbefore 38.2.0esr-1~deb8u138.2.0esr-1~deb8u1
Red Hat:enterprise_linux:5::clientfirefoxbefore 0:38.2.0-4.el5_110:38.2.0-4.el5_11
Red Hat:enterprise_linux:5::clientfirefox-debuginfobefore 0:38.2.0-4.el5_110:38.2.0-4.el5_11
Red Hat:enterprise_linux:6::clientfirefoxbefore 0:38.2.0-4.el6_70:38.2.0-4.el6_7
Red Hat:enterprise_linux:6::clientfirefox-debuginfobefore 0:38.2.0-4.el6_70:38.2.0-4.el6_7
Red Hat:enterprise_linux:7::clientfirefoxbefore 0:38.2.0-4.el7_10:38.2.0-4.el7_1
Red Hat:enterprise_linux:7::clientfirefox-debuginfobefore 0:38.2.0-4.el7_10:38.2.0-4.el7_1

Same product

mozilla: all records

Other highest-scoring records for the same primary product.

  • CVE-2010-3765Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before 3.1.6 and 3.0.x before 3.0.10, and SeaMonkey 2.x befKEV
    94Now
  • CVE-2019-11708Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxeKEV
    87Now
  • CVE-2015-4495The PDF reader in Mozilla Firefox before 39.0.3, Firefox ESR 38.x before 38.1.1, and Firefox OS before 2.2 allows remote attackers to bypassKEV
    86Now

Published before and after this one in the same product

  • ← EarlierCVE-2015-4491Aug 15, 2015 · Integer overflow in the make_filter_table function in pixops/pixops.c in gdk-pixbuf before 2.31.5, as used in Mozilla Firefox before 40.0 an
    30Monitor
  • ← EarlierCVE-2015-4492Aug 15, 2015 · Use-after-free vulnerability in the XMLHttpRequest::Open implementation in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 migh
    32Monitor
  • Later →CVE-2015-4496Aug 15, 2015 · Multiple integer overflows in libstagefright in Mozilla Firefox before 38.0 allow remote attackers to execute arbitrary code via crafted sam
    38Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:iceweasel38.2.0esr-1~deb7u1 · Debian:7Package registry (OSV)
red hat:firefox0:38.2.0-4.el5_11 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:firefox-debuginfo0:38.2.0-4.el5_11 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

    If successful

    Confidentiality
    C · data can be read
    Integrity
    C · data or configuration can be modified
    Availability
    C · the service can be disrupted
    Attack complexity
    M
    Confidentiality impact
    C
    Integrity impact
    C
    Availability impact
    C

    Weakness class (CWE)

    CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVSS vector

    AV:N/AC:M/Au:N/C:C/I:C/A:C

    nvd-primary

    Attack context

    MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

    ATT&CK techniques

    —

    Change log

    1. Fix✗ → ✓

    For records you follow, these changes also arrive as notifications. →

    References

    Show all references (14 more)

    Vendor advisories and official records. Exploit/PoC links are deliberately left out.

    All records