Buffer overflow in Mozilla Firefox
CVE-2019-11745
When encrypting with a block cipher, if a call to NSC_EncryptUpdate was made with data smaller than the block size, a small out of bounds write could occur. This could have caused heap corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.030 (87.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000
Affected products
- Mozilla Firefox — versions before 71
- Mozilla Firefox Esr — versions before 68.3
- Mozilla Firefox Esr
- Mozilla Thunderbird — versions before 68.3
- Siemens Ruggedcom Rox Mx5000
- Siemens Ruggedcom Rox Mx5000 Firmware
- Siemens Ruggedcom Rox Rx1400
- Siemens Ruggedcom Rox Rx1400 Firmware
- Siemens Ruggedcom Rox Rx1500
- Siemens Ruggedcom Rox Rx1500 Firmware
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.mozilla.org/security/advisories/mfsa2019-36/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2019-38/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2019-37/ (Vendor Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Patch, Issue Tracking, Vendor Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-01/msg00000.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-01/msg00001.html (vendor-advisory, Mailing List, Third Party Advisory, Issue Tracking)
- lists.opensuse.org/opensuse-security-announce/2020-01/msg00006.html (vendor-advisory, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4241-1/ (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2020:0243 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2020:0466 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-11745?
- CVE-2019-11745 is a high-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2020-01-08.
- How severe is CVE-2019-11745?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2019-11745 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.