CVE-2017-7753
An out-of-bounds read occurs when applying style rules to pseudo-elements, such as ::first-line, using cached style data. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox
02 Description
An out-of-bounds read occurs when applying style rules to pseudo-elements, such as ::first-line, using cached style data. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 3.08% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 87.4% of scored records. A rank, not a probability.
- NVD base score
- 9.1 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2018-06-11 21:00Z8 YR AGO
- Last updated
- 2024-08-05 16:12Z2 YR AGO
- Reserved
- 2017-04-12
- Assigning CNA
- mozilla
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-125Out-of-bounds ReadBase
- Data version
- 5.1
- Document digest
- 227e15ae57dd6bc1372fbbb50308ebb3f0adf75d3da22fd2bd0b3e10db1259fe
05 Affected products
06 References
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2017-19/
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2017-20/
- www.debian.orgDSA-3968https://www.debian.org/security/2017/dsa-3968
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2017-18/
- access.redhat.comRHSA-2017:2456https://access.redhat.com/errata/RHSA-2017:2456
- access.redhat.comRHSA-2017:2534https://access.redhat.com/errata/RHSA-2017:2534
- www.securityfocus.com100315http://www.securityfocus.com/bid/100315
- bugzilla.mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=1353312
- www.securitytracker.com1039124http://www.securitytracker.com/id/1039124
- security.gentoo.orgGLSA-201803-14https://security.gentoo.org/glsa/201803-14
- www.debian.orgDSA-3928https://www.debian.org/security/2017/dsa-3928
07 Fixed in
Arch Linux
- firefox Fixed in 55.0-1
- thunderbird Fixed in 52.3.0-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
Debian 12
- firefox-esr Fixed in 52.3.0esr-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- firefox-esr Fixed in 52.3.0esr-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- firefox-esr Fixed in 52.3.0esr-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- firefox Fixed in 55.0.1+build2-0ubuntu0.14.04.2
- thunderbird Fixed in 1:52.3.0+build1-0ubuntu0.14.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- firefox Fixed in 55.0.1+build2-0ubuntu0.16.04.2
- thunderbird Fixed in 1:52.3.0+build1-0ubuntu0.16.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- thunderbird Fixed in 1:52.4.0+build1-0ubuntu2
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.