CVE-2022-43552

A use after free vulnerability exists in curl <7.87.0. Curl can be asked to tunnel virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

A use after free vulnerability exists in curl <7.87.0. Curl can be asked to tunnel virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

A use after free vulnerability exists in curl <7.87.0. Curl can be asked to tunnel virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

A use after free vulnerability exists in curl <7.87.0. Curl can be asked to tunnel virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

A use after free vulnerability exists in curl <7.87.0. Curl can be asked to tunnel virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

A use after free vulnerability exists in curl <7.87.0. Curl can be asked to tunnel virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

A use after free vulnerability exists in curl <7.87.0. Curl can be asked to tunnel virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

A use after free vulnerability exists in curl <7.87.0. Curl can be asked to tunnel virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

cURL is a computer software project providing a library (libcurl) and command-line tool (curl) for transferring data using various protocols.

Security Fix(es):

A vulnerability was found in curl. In this issue, curl can be asked to tunnel all protocols virtually it supports through an HTTP proxy. HTTP proxies can deny these tunnel operations using an appropriate HTTP error response code. When getting denied to tunnel the specific SMB or TELNET protocols, curl can use a heap-allocated struct after it has been freed and shut down the code path in its transfer.(CVE-2022-43552)

cURL is a computer software project providing a library (libcurl) and command-line tool (curl) for transferring data using various protocols.

Security Fix(es):

A vulnerability was found in curl. In this issue, curl can be asked to tunnel all protocols virtually it supports through an HTTP proxy. HTTP proxies can deny these tunnel operations using an appropriate HTTP error response code. When getting denied to tunnel the specific SMB or TELNET protocols, curl can use a heap-allocated struct after it has been freed and shut down the code path in its transfer.(CVE-2022-43552)

cURL is a computer software project providing a library (libcurl) and command-line tool (curl) for transferring data using various protocols.

Security Fix(es):

A vulnerability was found in curl. In this issue, curl can be asked to tunnel all protocols virtually it supports through an HTTP proxy. HTTP proxies can deny these tunnel operations using an appropriate HTTP error response code. When getting denied to tunnel the specific SMB or TELNET protocols, curl can use a heap-allocated struct after it has been freed and shut down the code path in its transfer.(CVE-2022-43552)

A vulnerability exists in curl <7.87.0 HSTS check that could be bypassed to trick it to keep using HTTP. Using its HSTS support, curl can be instructed to use HTTPS instead of using an insecure clear-text HTTP step even when HTTP is provided in the URL. However, the HSTS mechanism could be bypassed if the host name in the given URL first uses IDN characters that get replaced to ASCII counterparts as part of the IDN conversion. Like using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop (U+002E) .. Then in a subsequent request, it does not detect the HSTS state and makes a clear text transfer. Because it would store the info IDN encoded but look for it IDN decoded.(CVE-2022-43551)

A use after free vulnerability exists in curl <7.87.0. Curl can be asked to tunnel virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

The curl packages provide the libcurl library and the curl utility for downloading files from servers using various protocols, including HTTP, FTP, and LDAP.

Security Fix(es):

• curl: Incorrect handling of control code characters in cookies (CVE-2022-35252)
• curl: Use-after-free triggered by an HTTP proxy deny response (CVE-2022-43552)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

The curl packages provide the libcurl library and the curl utility for downloading files from servers using various protocols, including HTTP, FTP, and LDAP.

Security Fix(es):

• curl: Incorrect handling of control code characters in cookies (CVE-2022-35252)
• curl: Use-after-free triggered by an HTTP proxy deny response (CVE-2022-43552)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

• SECURITY UPDATE: HTTP Proxy deny use-after-free
  • debian/patches/CVE-2022-43552.patch:
    • smb/telnet: do not free the protocol struct in *_done().
    • conn: don't free easy handle data in handler->disconnect.
  • CVE-2022-43552

• CVE-2022-43552: smb/telnet: do not free the protocol struct in *_done()
• CVE-2022-35252: cookie: reject cookies with "control bytes"

• CVE-2022-43552: smb/telnet: do not free the protocol struct in *_done()
• CVE-2022-35252: cookie: reject cookies with "control bytes"

curl can be asked to tunnel virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations using an appropriate HTTP error response code.

When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

Another HSTS bypass via IDN. (CVE-2022-43551) HTTP Proxy deny use-after-free. (CVE-2022-43552)

These are all security issues fixed in the curl-7.87.0-1.1 package on the GA media of openSUSE Tumbleweed.

This update for curl fixes the following issues:

• CVE-2022-43552: HTTP Proxy deny use-after-free (bsc#1206309).
• CVE-2022-43551: Fixed HSTS bypass via IDN (bsc#1206308).

This update for curl fixes the following issues:

• CVE-2022-43552: HTTP Proxy deny use-after-free (bsc#1206309).

This update for curl fixes the following issues:

• CVE-2022-43552: HTTP Proxy deny use-after-free (bsc#1206309).

This update for curl fixes the following issues:

• CVE-2023-28320: Fixed siglongjmp race condition (bsc#1211231).
• CVE-2023-28321: Fixed IDN wildcard matching (bsc#1211232).
• CVE-2023-28322: Fixed POST-after-PUT confusion (bsc#1211233).
• CVE-2023-27533: Fixed TELNET option IAC injection (bsc#1209209).
• CVE-2023-27534: Fixed SFTP path ~ resolving discrepancy (bsc#1209210).
• CVE-2023-27535: Fixed FTP too eager connection reuse (bsc#1209211).
• CVE-2023-27536: Fixed GSS delegation too eager connection reuse (bsc#1209212).
• CVE-2023-27538: Fixed SSH connection too eager reuse still (bsc#1209214).
• CVE-2022-43552: HTTP Proxy deny use-after-free (bsc#1206309).
• CVE-2023-23916: Fixed HTTP multi-header compression denial of service (bsc#1207992).

This update for curl fixes the following issues:

• CVE-2023-28320: Fixed siglongjmp race condition (bsc#1211231).
• CVE-2023-28321: Fixed IDN wildcard matching (bsc#1211232).
• CVE-2023-28322: Fixed POST-after-PUT confusion (bsc#1211233).
• CVE-2023-27533: Fixed TELNET option IAC injection (bsc#1209209).
• CVE-2023-27534: Fixed SFTP path ~ resolving discrepancy (bsc#1209210).
• CVE-2023-27535: Fixed FTP too eager connection reuse (bsc#1209211).
• CVE-2023-27536: Fixed GSS delegation too eager connection reuse (bsc#1209212).
• CVE-2023-27538: Fixed SSH connection too eager reuse still (bsc#1209214).
• CVE-2022-43552: HTTP Proxy deny use-after-free (bsc#1206309).
• CVE-2023-23916: Fixed HTTP multi-header compression denial of service (bsc#1207992).

Hiroki Kurosawa discovered that curl incorrectly handled HSTS support when certain hostnames included IDN characters. A remote attacker could possibly use this issue to cause curl to use unencrypted connections. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 22.10. (CVE-2022-43551)

It was discovered that curl incorrectly handled denials when using HTTP proxies. A remote attacker could use this issue to cause curl to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2022-43552)

Harry Sintonen and Tomas Hoger discovered that curl incorrectly handled TELNET connections when the -t option was used on the command line. Uninitialized data possibly containing sensitive information could be sent to the remote server, contrary to expectations. This issue was only fixed in Ubuntu 14.04 ESM. (CVE-2021-22898, CVE-2021-22925)

It was discovered that curl incorrectly handled denials when using HTTP proxies. A remote attacker could use this issue to cause curl to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2022-43552)