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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
The shmop functions in PHP before 4.4.5, and before 5.2.1 in the 5.x series, do not verify that their arguments correspond to a shmop resource, which allows context-dependent attackers to read and write arbitrary memory locations via arguments associated with an inappropriate resource, as demonstrated by a GD Image resource.
View Analysis Description
Access Vector (AV):
Access Complexity (AC):
Provides unauthorized accessAllows unauthorized disclosure of informationAllows disruption of service
The PHP interpreter does not offer a reliable "sandboxed" security
layer (as found in, say, a JVM) in which untrusted scripts can be run;
any script run by the PHP interpreter must be trusted with the
privileges of the interpreter itself. We therefore do not classify
this issue as security-sensitive since no trust boundary is crossed.
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https://www.exploit-db.com/exploits/3426 [No Types Assigned]
https://www.exploit-db.com/exploits/3427 [No Types Assigned]