SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2015-4487

The nsTSubstring::ReplacePrep function in Mozilla Firefox before 40.0, Firefox ESR 38.x before 38.2, and Firefox OS before 2.2 might allow remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via…

HIGH 7.5EPSS 3.82%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (3.82%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

The nsTSubstring::ReplacePrep function in Mozilla Firefox before 40.0, Firefox ESR 38.x before 38.2, and Firefox OS before 2.2 might allow remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via unknown vectors, related to an "overflow."

CVSS 2.0
7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS
3.82% probability · 89th percentile
CISA KEV
Not listed
Weakness
CWE-119
Affected
mozilla/firefox · mozilla/firefox os · canonical/ubuntu linux · opensuse/opensuse · oracle/solaris
Source
security@mozilla.org

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.