The installer in PEAR 1.9.2 and earlier allows local users to overwrite arbitrary files via a symlink attack on the package.xml file, relate
The installer in PEAR 1.9.2 and earlier allows local users to overwrite arbitrary files via a symlink attack on the package.xml file, related to the (1) download_dir, (2) cache_dir, (3) tmp_dir, and (4) pear-build-download directories. NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-1072.
- Published
- Mar 2, 2011
- Updated
- Jun 16, 2026
- EPSS
- 0.3% · 22th percentile
- CWE
- CWE-59
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Report tools
Action score
13
Monitor
Low priority for now.
- CVSS
- 13 / 40 · 3.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.3%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| php | pear | cpe:2.3:a:php:pear |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- php pearup to 1.9.2 inclusive
- php pear0.10
- php pear0.11
- php pear0.2.2
- php pear0.9
- php pear0.90
- php pear1.0
- php pear1.0.1
- php pear1.1
- php pear1.2
- php pear1.2.1
- php pear1.3
- php pear1.3.1
- php pear1.3.3
- php pear1.3.3.1
- php pear1.3.4
- php pear1.3.5
- php pear1.3.6
- php pear1.4.0
- php pear1.4.1
Same product
php: all recordsOther highest-scoring records for the same primary product.
- CVE-2017-5630PECL in the download utility class in the Installer in PEAR Base System v1.10.1 does not validate file types and filenames after a redirect,34Monitor
- CVE-2005-4154Unspecified vulnerability in PEAR installer 1.4.2 and earlier allows user-assisted attackers to execute arbitrary code via a crafted package22Monitor
- CVE-2011-1072The installer in PEAR before 1.9.2 allows local users to overwrite arbitrary files via a symlink attack on the package.xml file, related to 13Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
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.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
If successful
- Confidentiality
- none
- Integrity
- P · data or configuration can be modified
- Availability
- P · the service can be disrupted
- Attack complexity
- M
- Confidentiality impact
- None
- Integrity impact
- P
- Availability impact
- P
Weakness class (CWE)
CWE-59 · Improper Link Resolution Before File Access ('Link Following')CVSS vector
AV:L/AC:M/Au:N/C:N/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.
Attack patterns (CAPEC)
ATT&CK techniques
- Obfuscated Files or Information: HTML SmugglingT1027.006
- Obfuscated Files or Information: Embedded PayloadsT1027.009
- Boot or Logon Autostart Execution:Shortcut ModificationT1547.009
- Hide Artifacts: Resource ForkingT1564.009
- Hijack Execution Flow: Executable Installer File Permissions WeaknessT1574.005
- Hijack Execution Flow: Services File Permissions WeaknessT1574.010
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- openwall.com/lists/oss-security/2011/02/28/5
- openwall.com/lists/oss-security/2011/03/01/4
- openwall.com/lists/oss-security/2011/03/01/5
- openwall.com/lists/oss-security/2011/03/01/7
- openwall.com/lists/oss-security/2011/03/01/8
- openwall.com/lists/oss-security/2011/03/01/9
- pear.php.net/bugs/bug.php?id=18056
- exchange.xforce.ibmcloud.com/vulnerabilities/65911
Vendor advisories and official records. Exploit/PoC links are deliberately left out.