CVE-2017-7818: debian debian_linux Use After Free

CVSS: 9.8v3.0CriticalModified

AliasesUBUNTU-CVE-2017-7818DEBIAN-CVE-2017-7818

Published 11-06-2018Last modified 05-08-2024

Vulnerability summary

CVE-2017-7818 is a critical (CVSS 9.8) Use After Free vulnerability in debian debian_linux. EPSS estimates a 3.31% chance of exploitation in the next 30 days, higher than 88.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk

70/100

0100

High · default modelHow is this calculated?

CVSS score

9.8/10

010

Critical · v3.0 (NVD)

EPSS score

3.31%

0%100%

Low · -0.07 pp in 30 days

KEVNot listedIn no KEV catalog

RansomwareNone recordedNo known use recorded

Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 18 · Related 10

DLA-1118-1 DLA-1153-1 DSA-3987-1 DSA-4014-1 MGASA-2017-0361 MGASA-2018-0018+12 more

Timeline

11-06-2018
PublishedVulnerability first disclosed.
05-08-2024
Last modifiedVulnerability information updated.

Description

A use-after-free vulnerability can occur when manipulating arrays of Accessible Rich Internet Applications (ARIA) elements within containers through the DOM. This results in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

CVSS metrics

4 scores · 3 sources · 2 versions

v3.09.8v2.07.5

EPSS trend

Probability

3.31%

Chance of exploitation in the next 30 days

Percentile

88%

Versus all other CVEs

30-day change

-0.07 pp

From 3.38% on 19-09-2026

19-09-202619-10-2026

EPSS score

3.31%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found

referenceUnverified
Exploit Reference (bugzilla.mozilla.org)
Maturity: unknown

Weaknesses

CWE · root cause

CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected systems

Redhat5 products

enterprise_linux_desktop6.0 | 7.0
enterprise_linux_server6.0 | 7.0
enterprise_linux_server_aus7.4
enterprise_linux_server_eus7.2 | 7.4 | 7.5
enterprise_linux_workstation6.0 | 7.0

Debian3 products

firefox-esr< 52.4.0esr-2
thunderbird< 1:52.4.0-1
debian_linuxEOL7.0 | 8.0 | 9.0

Mozilla3 products

firefox≥ unspecified, < 56 | < 52.4.0 | < 56.0
firefox_esr≥ unspecified, < 52.4
thunderbird≥ unspecified, < 52.4 | < 52.4.0

Ubuntu2 products

firefox< 56.0+build6-0ubuntu0.14.04.1 | < 56.0+build6-0ubuntu0.16.04.1 | < 56.0+build6-0ubuntu1
thunderbird< 1:52.4.0+build1-0ubuntu0.14.04.2 | < 1:52.4.0+build1-0ubuntu0.16.04.2 | < 1:52.4.0+build1-0ubuntu2

4 vendors · 13 products

References

18 links

lists.debian.org/debian-lts-announce/2017/11/msg00000.htmlMailing ListX Refsource MLISTThird Party Advisory
www.mozilla.org/security/advisories/mfsa2017-22/X Refsource CONFIRMVendor Advisory
www.securitytracker.com/id/1039465VDB EntryX Refsource SECTRACKThird Party Advisory
access.redhat.com/errata/RHSA-2017:2831Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/errata/RHSA-2017:2885Vendor AdvisoryX Refsource REDHATThird Party Advisory
www.mozilla.org/security/advisories/mfsa2017-21/X Refsource CONFIRMVendor Advisory
www.securityfocus.com/bid/101055VDB EntryX Refsource BIDThird Party Advisory
bugzilla.mozilla.org/show_bug.cgi?id=1363723X Refsource CONFIRMExploitIssue TrackingPatch
www.debian.org/security/2017/dsa-4014Vendor AdvisoryX Refsource DEBIANThird Party Advisory
www.mozilla.org/security/advisories/mfsa2017-23/X Refsource CONFIRMVendor Advisory

Show all 18 references

www.debian.org/security/2017/dsa-3987Vendor AdvisoryX Refsource DEBIANThird Party Advisory
security.gentoo.org/glsa/201803-14Vendor AdvisoryX Refsource GENTOOThird Party Advisory
ubuntu.com/security/CVE-2017-7818REPORT
www.mozilla.org/en-US/security/advisories/mfsa2017-21/REPORT
ubuntu.com/security/notices/USN-3435-1Advisory
ubuntu.com/security/notices/USN-3436-1Advisory
www.cve.org/CVERecord?id=CVE-2017-7818REPORT
security-tracker.debian.org/tracker/CVE-2017-7818Advisory

Vulnerability summary

Advisory lineage

Timeline

Description

CVSS metrics

EPSS trend

Known exploited

Public exploits

Weaknesses

Affected systems

References

Related vulnerabilities