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Vulnerability details: VCID-kxzj-2jys-ubc5
Vulnerability ID VCID-kxzj-2jys-ubc5
Aliases CVE-2017-7749
Summary A use-after-free vulnerability when using an incorrect URL during the reloading of a docshell. This results in a potentially exploitable crash.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-416 Use After Free
System Score Found at
cvssv3 9.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2017-7749.json
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
epss 0.03594 https://api.first.org/data/v1/epss?cve=CVE-2017-7749
cvssv2 6.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3 7.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 7.5 https://nvd.nist.gov/vuln/detail/CVE-2017-7749
cvssv3 9.8 https://nvd.nist.gov/vuln/detail/CVE-2017-7749
archlinux Critical https://security.archlinux.org/AVG-302
archlinux Critical https://security.archlinux.org/AVG-303
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2017-15
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2017-16
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2017-17
Reference id Reference type URL
https://access.redhat.com/errata/RHSA-2017:1440
https://access.redhat.com/errata/RHSA-2017:1561
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2017-7749.json
https://api.first.org/data/v1/epss?cve=CVE-2017-7749
https://bugzilla.mozilla.org/show_bug.cgi?id=1355039
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5470
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5472
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7749
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7750
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7751
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7752
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7754
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7756
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7757
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7758
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7764
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7771
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7772
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7773
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7774
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7776
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7777
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7778
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://www.debian.org/security/2017/dsa-3881
https://www.debian.org/security/2017/dsa-3918
https://www.mozilla.org/security/advisories/mfsa2017-15/
https://www.mozilla.org/security/advisories/mfsa2017-16/
https://www.mozilla.org/security/advisories/mfsa2017-17/
http://www.securityfocus.com/bid/99057
http://www.securitytracker.com/id/1038689
1461253 https://bugzilla.redhat.com/show_bug.cgi?id=1461253
ASA-201706-19 https://security.archlinux.org/ASA-201706-19
ASA-201706-20 https://security.archlinux.org/ASA-201706-20
AVG-302 https://security.archlinux.org/AVG-302
AVG-303 https://security.archlinux.org/AVG-303
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
CVE-2017-7749 https://nvd.nist.gov/vuln/detail/CVE-2017-7749
mfsa2017-15 https://www.mozilla.org/en-US/security/advisories/mfsa2017-15
mfsa2017-16 https://www.mozilla.org/en-US/security/advisories/mfsa2017-16
mfsa2017-17 https://www.mozilla.org/en-US/security/advisories/mfsa2017-17
USN-3315-1 https://usn.ubuntu.com/3315-1/
USN-3321-1 https://usn.ubuntu.com/3321-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2017-7749.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2017-7749
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2017-7749
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.87326
EPSS Score 0.03594
Published At Aug. 15, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:19.332750+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2017/mfsa2017-17.yml 37.0.0