7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.3 High
AI Score
Confidence
High
0.007 Low
EPSS
Percentile
80.6%
Symfony 4.3, 4.4.0 to 4.4.12, 5.0, and 5.1.0 to 5.1.4 versions of the Symfony HttpClient component are affected by this security issue.
The issue has been fixed in Symfony 4.4.13 and 5.1.5. Symfony 4.3 and 5.0 won’t be patched as they are not maintained anymore.
The CachingHttpClient
class from the HttpClient Symfony componeny relies on the HttpCache
class to handle requests. HttpCache
uses internal headers like X-Body-Eval
and X-Body-File
to control the restoration of cached responses. The class was initially written with surrogate caching and ESI support in mind (all HTTP calls come from a trusted backend in that scenario). But when used by CachingHttpClient
and if an attacker can control the response for a request being made by the CachingHttpClient
, remote code execution is possible.
HTTP headers designed for internal use in HttpCache
are now stripped from remote responses before being passed to HttpCache
.
The patch for this issue is available here for the 4.4 branch.
I would like to thank Matthias Pigulla (webfactory GmbH) for reporting and fixing the issue.
Log in to add a reaction to this post
add a reaction ❤️ 👍 🚀
Published in #Security Advisories
7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.3 High
AI Score
Confidence
High
0.007 Low
EPSS
Percentile
80.6%