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CVE-2013-1676

26
FAUCET Score

CVE-2013-1676 is a critical out-of-bounds read vulnerability in the SelectionIterator::GetNextSegment function affecting Mozilla Firefox (before 21.0, ESR 17.x before 17.0.6) and Thunderbird (before 17.0.6, ESR 17.x before 17.0.6). This flaw allows remote attackers to execute arbitrary code or cause a denial of service. With a CVSS score of 10.0, it represents a severe risk due to its network-based attack vector, low complexity, and complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 20.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
19.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:19.0:*:*:*:*:*:*:*
19.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:19.0.1:*:*:*:*:*:*:*
19.0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:19.0.2:*:*:*:*:*:*:*
20.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:20.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
5.71%
Probability of exploitation in next 30 days
EPSS Percentile
92.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0571 is in the 87th percentile among its peer group of 51,553 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:17.0.6-2.el6_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:17.0.6-1.el5_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:17.0.6-1.el5_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:17.0.6-1.el5_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:17.0.6-1.el6_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xulrunner-0:17.0.6-2.el6_4
View patch
mozillavendor investigatingvia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird

Vendor Advisories (1)

redhatCVE-2013-1676Critical

Mozilla: Memory corruption found using Address Sanitizer (MFSA 2013-48)

May 14, 2013

References

lists.opensuse.org / opensuse-security-announce/2013-05/msg00010.html
lists.opensuse.org / opensuse-security-announce/2013-05/msg00011.html
lists.opensuse.org / opensuse-security-announce/2013-05/msg00012.html
lists.opensuse.org / opensuse-security-announce/2013-06/msg00006.html
lists.opensuse.org / opensuse-security-announce/2013-06/msg00008.html
rhn.redhat.com / errata/RHSA-2013-0820.html
rhn.redhat.com / errata/RHSA-2013-0821.html
bugzilla.mozilla.org / show_bug.cgi
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16956
debian.org / security/2013/dsa-2699
mandriva.com / security/advisories
mozilla.org / security/announce/2013/mfsa2013-48.html
Vendor Advisory
securityfocus.com / bid/59863
ubuntu.com / usn/USN-1822-1
ubuntu.com / usn/USN-1823-1