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CVE-2013-4635

16
FAUCET Score

CVE-2013-4635 is an integer overflow vulnerability in the SdnToJewish function within the Calendar component of PHP versions prior to 5.3.26 and 5.4.16. This flaw allows unauthenticated, remote attackers to trigger an application hang, leading to a denial of service, by supplying a large argument to the jdtojewish function. With a CVSS score of 5.0, it is considered a medium-severity vulnerability, requiring low attack complexity to achieve a partial availability impact. There is no evidence of active exploitation, and no public exploit code or significant community discussion has been identified.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.3.25CPE matchmatch criteria
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:php:php:1.0:*:*:*:*:*:*:*
2.0CPE matchmatch criteria
cpe:2.3:a:php:php:2.0:*:*:*:*:*:*:*
2.0b10CPE matchmatch criteria
cpe:2.3:a:php:php:2.0b10:*:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:a:php:php:3.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.23%
Probability of exploitation in next 30 days
EPSS Percentile
90.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0423 is in the 86th percentile among its peer group of 23,690 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, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Vendor Advisories (1)

redhatCVE-2013-4635Moderate

php: Integer overflow in SndToJewish - DoS (excessive CPU use, interpreter hang)

May 22, 2013

References

lists.opensuse.org / opensuse-security-announce/2013-07/msg00034.html
lists.opensuse.org / opensuse-security-announce/2013-08/msg00006.html
lists.opensuse.org / opensuse-security-announce/2013-08/msg00007.html
bugs.php.net / bug.php
secunia.com / advisories/54104
attrition.org / pipermail/vim/2013-June/002697.html
php.net / ChangeLog-5.php
Vendor Advisory
securitytracker.com / id/1028699
ubuntu.com / usn/USN-1905-1