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NVD / CVE Program· CNA redhat

CVE-2011-1148: Use-after-free vulnerability in the substr_replace function in PHP 5.3.6 and earlier allows context-dependent attackers to cause a denial of…

HighCVSS 7.5 · v2.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 4.7% (FIRST EPSS); higher than 92% of all records.
  • No special conditions are required; it is repeatable.
  • Fixed version: php5 (Debian:6.0) 5.3.3-7+squeeze8; php (Red Hat:enterprise_linux:5::client_workstation) 0:5.1.6-27.el5_7.4; php-bcmath (Red Hat:enterprise_linux:5::client_workstation) 0:5.1.6-27.el5_7.4.

Low priority for now. Upgrade to php5 (Debian:6.0) 5.3.3-7+squeeze8; php (Red Hat:enterprise_linux:5::client_workstation) 0:5.1.6-27.el5_7.4; php-bcmath (Red Hat:enterprise_linux:5::client_workstation) 0:5.1.6-27.el5_7.4 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Use-after-free vulnerability in the substr_replace function in PHP 5.3.6 and earlier allows context-dependent attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact by using the same variable for multiple arguments.

Published
Mar 18, 2011
Updated
Jun 16, 2026
EPSS
4.7% · 92th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 4.7%

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  • Not in KEV: no record of exploitation in the wild
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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
phpphp

Using php? Add it to your stack and be the first to know about CVEs like this one. (PHP)

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When you'll hear from us

  • when a new CVE affecting this product is published
  • when a record in your stack enters KEV or is weaponized

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits every 10 minutes on paid plans, on the hour on the free plan.

Your free account also gets you

  • CVE alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools, at most 30 a day (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

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Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every Monday

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • php phpup to 5.3.6 inclusive
  • php php1.0
  • php php2.0
  • php php2.0b10
  • php php3.0
  • php php3.0.1
  • php php3.0.10
  • php php3.0.11
+12 more rows
  • php php3.0.12
  • php php3.0.13
  • php php3.0.14
  • php php3.0.15
  • php php3.0.16
  • php php3.0.17
  • php php3.0.18
  • php php3.0.2
  • php php3.0.3
  • php php3.0.4
  • php php3.0.5
  • php php3.0.6

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:6.0php5before 5.3.3-7+squeeze85.3.3-7+squeeze8
Red Hat:enterprise_linux:5::client_workstationphpbefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-bcmathbefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-clibefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-commonbefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-dbabefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-debuginfobefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-develbefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-gdbefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-imapbefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-ldapbefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-mbstringbefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-mysqlbefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-ncursesbefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-odbcbefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-pdobefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-pgsqlbefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-snmpbefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-soapbefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-xmlbefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp-xmlrpcbefore 0:5.1.6-27.el5_7.40:5.1.6-27.el5_7.4
Red Hat:enterprise_linux:5::client_workstationphp53before 0:5.3.3-1.el5_7.30:5.3.3-1.el5_7.3
Red Hat:enterprise_linux:5::client_workstationphp53-bcmathbefore 0:5.3.3-1.el5_7.30:5.3.3-1.el5_7.3
Red Hat:enterprise_linux:5::client_workstationphp53-clibefore 0:5.3.3-1.el5_7.30:5.3.3-1.el5_7.3

+46

Same product

php: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-4577Argument Injection in PHP-CGIKEV
    99Now
  • CVE-2019-11043Underflow in PHP-FPM can lead to RCEKEV
    99Now
  • CVE-2012-1823sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI script (aka php-cgi), does not properly handle…KEV
    99Now

Published before and after this one in the same product

  • ← EarlierCVE-2011-1092Mar 15, 2011 · Integer overflow in ext/shmop/shmop.c in PHP before 5.3.6 allows context-dependent attackers to cause a denial of service (crash) and…
    35Monitor
  • ← EarlierCVE-2011-1153Mar 16, 2011 · Multiple format string vulnerabilities in phar_object.c in the phar extension in PHP 5.3.5 and earlier allow context-dependent attackers to…
    32Monitor
  • Later →CVE-2011-0421Mar 19, 2011 · The _zip_name_locate function in zip_name_locate.c in the Zip extension in PHP before 5.3.6 does not properly handle a…
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:php55.3.3-7+squeeze8 · Debian:6.0Package registry (OSV)
red hat:php530:5.3.3-1.el5_7.3 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:php53-bcmath0:5.3.3-1.el5_7.3 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:php53-cli0:5.3.3-1.el5_7.3 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:php53-common0:5.3.3-1.el5_7.3 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:php53-dba0:5.3.3-1.el5_7.3 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:php53-debuginfo0:5.3.3-1.el5_7.3 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:php53-devel0:5.3.3-1.el5_7.3 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:php53-gd0:5.3.3-1.el5_7.3 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:php53-imap0:5.3.3-1.el5_7.3 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:php53-intl0:5.3.3-1.el5_7.3 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:php53-ldap0:5.3.3-1.el5_7.3 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:php53-mbstring0:5.3.3-1.el5_7.3 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
P · data can be read
Integrity
P · data or configuration can be modified
Availability
P · the service can be disrupted
Attack complexity
Low
Confidentiality impact
P
Integrity impact
P
Availability impact
P

Weakness class (CWE)

CWE-399 · Resource Management Errors

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (13 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records