diff options
Diffstat (limited to 'meta-networking/recipes-daemons/squid/files/CVE-2023-46846.patch')
| -rw-r--r-- | meta-networking/recipes-daemons/squid/files/CVE-2023-46846.patch | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/meta-networking/recipes-daemons/squid/files/CVE-2023-46846.patch b/meta-networking/recipes-daemons/squid/files/CVE-2023-46846.patch new file mode 100644 index 0000000000..a6d0965e7a --- /dev/null +++ b/meta-networking/recipes-daemons/squid/files/CVE-2023-46846.patch @@ -0,0 +1,169 @@ +From 05f6af2f4c85cc99323cfff6149c3d74af661b6d Mon Sep 17 00:00:00 2001 +From: Amos Jeffries <yadij@users.noreply.github.com> +Date: Fri, 13 Oct 2023 08:44:16 +0000 +Subject: [PATCH] RFC 9112: Improve HTTP chunked encoding compliance (#1498) + +Upstream-Status: Backport [import from ubuntu https://git.launchpad.net/ubuntu/+source/squid/tree/debian/patches/CVE-2023-46846.patch?h=ubuntu/focal-security&id=9ccd217ca9428c9a6597e9310a99552026b245fa +Upstream commit https://github.com/squid-cache/squid/commit/05f6af2f4c85cc99323cfff6149c3d74af661b6d] +CVE: CVE-2023-46846 +Signed-off-by: Vijay Anusuri <vanusuri@mvista.com> +--- + src/http/one/Parser.cc | 8 +------- + src/http/one/Parser.h | 4 +--- + src/http/one/TeChunkedParser.cc | 23 ++++++++++++++++++----- + src/parser/Tokenizer.cc | 12 ++++++++++++ + src/parser/Tokenizer.h | 7 +++++++ + 5 files changed, 39 insertions(+), 15 deletions(-) + +--- a/src/http/one/Parser.cc ++++ b/src/http/one/Parser.cc +@@ -65,16 +65,10 @@ Http::One::Parser::DelimiterCharacters() + void + Http::One::Parser::skipLineTerminator(Tokenizer &tok) const + { +- if (tok.skip(Http1::CrLf())) +- return; +- + if (Config.onoff.relaxed_header_parser && tok.skipOne(CharacterSet::LF)) + return; + +- if (tok.atEnd() || (tok.remaining().length() == 1 && tok.remaining().at(0) == '\r')) +- throw InsufficientInput(); +- +- throw TexcHere("garbage instead of CRLF line terminator"); ++ tok.skipRequired("line-terminating CRLF", Http1::CrLf()); + } + + /// all characters except the LF line terminator +--- a/src/http/one/Parser.h ++++ b/src/http/one/Parser.h +@@ -120,9 +120,7 @@ protected: + * detect and skip the CRLF or (if tolerant) LF line terminator + * consume from the tokenizer. + * +- * \throws exception on bad or InsuffientInput. +- * \retval true only if line terminator found. +- * \retval false incomplete or missing line terminator, need more data. ++ * \throws exception on bad or InsufficientInput + */ + void skipLineTerminator(Tokenizer &) const; + +--- a/src/http/one/TeChunkedParser.cc ++++ b/src/http/one/TeChunkedParser.cc +@@ -91,6 +91,11 @@ Http::One::TeChunkedParser::parseChunkSi + { + Must(theChunkSize <= 0); // Should(), really + ++ static const SBuf bannedHexPrefixLower("0x"); ++ static const SBuf bannedHexPrefixUpper("0X"); ++ if (tok.skip(bannedHexPrefixLower) || tok.skip(bannedHexPrefixUpper)) ++ throw TextException("chunk starts with 0x", Here()); ++ + int64_t size = -1; + if (tok.int64(size, 16, false) && !tok.atEnd()) { + if (size < 0) +@@ -121,7 +126,7 @@ Http::One::TeChunkedParser::parseChunkMe + // bad or insufficient input, like in the code below. TODO: Expand up. + try { + parseChunkExtensions(tok); // a possibly empty chunk-ext list +- skipLineTerminator(tok); ++ tok.skipRequired("CRLF after [chunk-ext]", Http1::CrLf()); + buf_ = tok.remaining(); + parsingStage_ = theChunkSize ? Http1::HTTP_PARSE_CHUNK : Http1::HTTP_PARSE_MIME; + return true; +@@ -132,12 +137,14 @@ Http::One::TeChunkedParser::parseChunkMe + // other exceptions bubble up to kill message parsing + } + +-/// Parses the chunk-ext list (RFC 7230 section 4.1.1 and its Errata #4667): ++/// Parses the chunk-ext list (RFC 9112 section 7.1.1: + /// chunk-ext = *( BWS ";" BWS chunk-ext-name [ BWS "=" BWS chunk-ext-val ] ) + void +-Http::One::TeChunkedParser::parseChunkExtensions(Tokenizer &tok) ++Http::One::TeChunkedParser::parseChunkExtensions(Tokenizer &callerTok) + { + do { ++ auto tok = callerTok; ++ + ParseBws(tok); // Bug 4492: IBM_HTTP_Server sends SP after chunk-size + + if (!tok.skip(';')) +@@ -145,6 +152,7 @@ Http::One::TeChunkedParser::parseChunkEx + + parseOneChunkExtension(tok); + buf_ = tok.remaining(); // got one extension ++ callerTok = tok; + } while (true); + } + +@@ -158,11 +166,14 @@ Http::One::ChunkExtensionValueParser::Ig + /// Parses a single chunk-ext list element: + /// chunk-ext = *( BWS ";" BWS chunk-ext-name [ BWS "=" BWS chunk-ext-val ] ) + void +-Http::One::TeChunkedParser::parseOneChunkExtension(Tokenizer &tok) ++Http::One::TeChunkedParser::parseOneChunkExtension(Tokenizer &callerTok) + { ++ auto tok = callerTok; ++ + ParseBws(tok); // Bug 4492: ICAP servers send SP before chunk-ext-name + + const auto extName = tok.prefix("chunk-ext-name", CharacterSet::TCHAR); ++ callerTok = tok; // in case we determine that this is a valueless chunk-ext + + ParseBws(tok); + +@@ -176,6 +187,8 @@ Http::One::TeChunkedParser::parseOneChun + customExtensionValueParser->parse(tok, extName); + else + ChunkExtensionValueParser::Ignore(tok, extName); ++ ++ callerTok = tok; + } + + bool +@@ -209,7 +222,7 @@ Http::One::TeChunkedParser::parseChunkEn + Must(theLeftBodySize == 0); // Should(), really + + try { +- skipLineTerminator(tok); ++ tok.skipRequired("chunk CRLF", Http1::CrLf()); + buf_ = tok.remaining(); // parse checkpoint + theChunkSize = 0; // done with the current chunk + parsingStage_ = Http1::HTTP_PARSE_CHUNK_SZ; +--- a/src/parser/Tokenizer.cc ++++ b/src/parser/Tokenizer.cc +@@ -147,6 +147,18 @@ Parser::Tokenizer::skipAll(const Charact + return success(prefixLen); + } + ++void ++Parser::Tokenizer::skipRequired(const char *description, const SBuf &tokenToSkip) ++{ ++ if (skip(tokenToSkip) || tokenToSkip.isEmpty()) ++ return; ++ ++ if (tokenToSkip.startsWith(buf_)) ++ throw InsufficientInput(); ++ ++ throw TextException(ToSBuf("cannot skip ", description), Here()); ++} ++ + bool + Parser::Tokenizer::skipOne(const CharacterSet &chars) + { +--- a/src/parser/Tokenizer.h ++++ b/src/parser/Tokenizer.h +@@ -115,6 +115,13 @@ public: + */ + SBuf::size_type skipAll(const CharacterSet &discardables); + ++ /** skips a given character sequence (string); ++ * does nothing if the sequence is empty ++ * ++ * \throws exception on mismatching prefix or InsufficientInput ++ */ ++ void skipRequired(const char *description, const SBuf &tokenToSkip); ++ + /** Removes a single trailing character from the set. + * + * \return whether a character was removed |