Skip to content
Sign in
Not rated

CVE-2020-1898 The fb_unserialize function did not impose a depth limit for nested deserialization

Description

The fb_unserialize function did not impose a depth limit for nested deserialization. That meant a maliciously constructed string could cause deserialization to recurse, leading to stack exhaustion. This issue affected HHVM prior to v4.32.3, between versions 4.33.0 and 4.56.0, 4.57.0, 4.58.0, 4.58.1, 4.59.0, 4.60.0, 4.61.0, 4.62.0.

Affected products and versions

Product Affected versions Fixed in
HHVM 4.62.0 4.62.1
HHVM 4.61.0 4.61.1
HHVM 4.60.0 4.60.1
HHVM 4.59.0 4.59.1
HHVM 4.58 4.58.0 → < 4.58.2 4.58.2
HHVM 4.57.0 4.57.1
HHVM 4.56 earliest → < 4.56.1 4.56.1
HHVM 4.33 4.33.0 → latest No fix stated
HHVM 4.32 earliest → < 4.32.3 4.32.3

Other CVEs of HHVM

The 31 CVEs of HHVM →
CVE-2022-36937 HHVM 4.172.0 and all prior versions use TLS 1.0 for secure connections when handling tls:// URLs in the stream extension 9.8 Critical CVE-2019-3556 HHVM supports the use of an "admin" server which accepts administrative requests over HTTP Not rated CVE-2021-24036 Passing an attacker controlled size when creating an IOBuf could cause integer overflow, leading to an out of bounds… Not rated CVE-2020-1900 When unserializing an object with dynamic properties HHVM needs to pre-reserve the full size of the dynamic property… Not rated
Track this CVE