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fix(libfcgi): CVE-2025-23016 #2

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6 changes: 6 additions & 0 deletions debian/changelog
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Original file line number Diff line number Diff line change
@@ -1,3 +1,9 @@
libfcgi (2.4.2-2deepin1) unstable; urgency=medium

* fix(CVE-2025-23016): integer overflow in ReadParams function

-- hudeng <[email protected]> Wed, 29 Apr 2026 14:00:46 +0800

libfcgi (2.4.2-2deepin0) unstable; urgency=medium

* No source change upload against GCC 12.
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36 changes: 36 additions & 0 deletions debian/patches/CVE-2025-23016.patch
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Original file line number Diff line number Diff line change
@@ -0,0 +1,36 @@
From b0eabcaf4d4f371514891a52115c746815c2ff15 Mon Sep 17 00:00:00 2001
From: Pycatchown <[email protected]>
Date: Tue, 8 Apr 2025 17:39:30 +0200
Subject: [PATCH] Update fcgiapp.c

Fixing an integer overflow (CVE-2025-23016)
---
libfcgi/fcgiapp.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/libfcgi/fcgiapp.c b/libfcgi/fcgiapp.c
index 4ffe318..99c3630 100644
--- a/libfcgi/fcgiapp.c
+++ b/libfcgi/fcgiapp.c
@@ -1175,6 +1175,10 @@ static int ReadParams(Params *paramsPtr, FCGX_Stream *stream)
}
nameLen = ((nameLen & 0x7f) << 24) + (lenBuff[0] << 16)
+ (lenBuff[1] << 8) + lenBuff[2];
+ if (nameLen >= INT_MAX) {
+ SetError(stream, FCGX_PARAMS_ERROR);
+ return -1;
+ }
}
if((valueLen = FCGX_GetChar(stream)) == EOF) {
SetError(stream, FCGX_PARAMS_ERROR);
@@ -1187,6 +1191,10 @@ static int ReadParams(Params *paramsPtr, FCGX_Stream *stream)
}
valueLen = ((valueLen & 0x7f) << 24) + (lenBuff[0] << 16)
+ (lenBuff[1] << 8) + lenBuff[2];
+ if (valueLen >= INT_MAX) {
+ SetError(stream, FCGX_PARAMS_ERROR);
+ return -1;
+ }
}
/*
* nameLen and valueLen are now valid; read the name and value
1 change: 1 addition & 0 deletions debian/patches/series
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@@ -0,0 +1 @@
CVE-2025-23016.patch
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