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Vulnerability details: VCID-9sbe-na1d-aaag
Vulnerability ID VCID-9sbe-na1d-aaag
Aliases CVE-2021-29977
Summary Mozilla developers reported memory safety bugs present in Firefox 89. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 90.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-787 Out-of-bounds Write
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-29977.html
epss 0.00255 https://api.first.org/data/v1/epss?cve=CVE-2021-29977
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epss 0.00294 https://api.first.org/data/v1/epss?cve=CVE-2021-29977
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epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29977
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epss 0.0047 https://api.first.org/data/v1/epss?cve=CVE-2021-29977
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epss 0.0098 https://api.first.org/data/v1/epss?cve=CVE-2021-29977
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29977
cvssv3.1 8.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2021-29977
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-29977
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-29977
archlinux High https://security.archlinux.org/AVG-2148
generic_textual Medium https://ubuntu.com/security/notices/USN-5011-1
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-28
generic_textual Medium https://www.mozilla.org/en-US/security/advisories/mfsa2021-28/#CVE-2021-29977
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-29977.html
https://api.first.org/data/v1/epss?cve=CVE-2021-29977
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1665836%2C1686138%2C1704316%2C1706314%2C1709931%2C1712084%2C1712357%2C1714066
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29977
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://security.gentoo.org/glsa/202202-03
https://ubuntu.com/security/notices/USN-5011-1
https://www.mozilla.org/en-US/security/advisories/mfsa2021-28/#CVE-2021-29977
https://www.mozilla.org/security/advisories/mfsa2021-28/
ASA-202107-20 https://security.archlinux.org/ASA-202107-20
AVG-2148 https://security.archlinux.org/AVG-2148
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:*:*:*:*:*:*:*:*
CVE-2021-29977 https://nvd.nist.gov/vuln/detail/CVE-2021-29977
mfsa2021-28 https://www.mozilla.org/en-US/security/advisories/mfsa2021-28
USN-5011-1 https://usn.ubuntu.com/5011-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H 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:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29977
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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29977
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: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29977
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 0.65809
EPSS Score 0.00255
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.