Double Free

curl is vulnerable to Double Free. Two threads sharing the same HSTS data could end up doing a double-free or use-after-free due to missing mutexes or thread locks. This was introduced without consideration for sharing across separate threads, which could lead to a double-free or use-after-free...

Authentication Bypass

curl is vulnerable to Authentication Bypass. The library would reuse a previously created connection even if the GSS delegation CURLOPTGSSAPIDELEGATION option had been changed, but this setting was left out from configuration match checks, affecting krb5/kerberos/negotiate/GSSAPI transfers...

Authentication Bypass

curl is vulnerable to Authentication Bypass. The vulnerability exists because the SSH connection is too eager to reuse still since it keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup...

Authentication Bypass

curl is vulnerable to Authentication Bypass. The library would reuse a previously created FTP connection even when one or more options had been changed, leading to wrong credentials. Several FTP settings were left out from configuration match checks, making them easily match...

Path Traversal

curl is vulnerable to Path Traversal. The library supports SFTP transfers with a tilde character as the first path element to denote a path relative to the user's home directory. However, due to a bug, this can be used wrongly when used as a prefix in the first element...

curl -- multiple vulnerabilities

Wei Chong Tan, Harry Sintonen, and Hiroki Kurosawa reports: This update fixes 4 security vulnerabilities: Medium CVE-2023-28319: UAF in SSH sha256 fingerprint check. Reported by Wei Chong Tan on 2023-03-21 Low CVE-2023-28320: siglongjmp race condition. Reported by Harry Sintonen on 2023-04-02 Low...

Slackware: Security Advisory (SSA:2023-079-01)

The remote host is missing an update for the SPDX-FileCopyrightText: 2023 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Amazon Linux 2023 : curl, curl-minimal, libcurl (ALAS2023-2023-083)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-083 advisory. 2024-02-15: CVE-2022-27781 was added to this advisory. A vulnerability was found in curl. This security flaw allows reusing OAUTH2-authenticated connections without properly ensuring that the...

Amazon Linux 2023 : curl, curl-minimal, libcurl (ALAS2023-2023-114)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-114 advisory. A flaw was found in the Curl package, where the HSTS mechanism would be ignored by subsequent transfers when done on the same command line because the state would not be properly carried. This...

Ubuntu: Security Advisory (USN-5964-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2023 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

CLSA-2023-1679350332 curl: Fix of CVE-2023-23916

CVE-2023-23916: fix HTTP multi-header compression denial of service - fix testing system by adding the nonewline option...

CLSA-2023-1679349850 curl: Fix of CVE-2023-23916

CVE-2023-23916: fix HTTP multi-header compression denial of service - fix testing system by adding the nonewline option...

[slackware-security] curl

New curl packages are available for Slackware 14.0, 14.1, 14.2, 15.0, and -current to fix security issues. Here are the details from the Slackware 15.0 ChangeLog: patches/packages/curl-8.0.1-i586-1slack15.0.txz: Upgraded. This update fixes security issues: SSH connection too eager reuse still. HS...

USN-5964-1: curl vulnerabilities

Harry Sintonen discovered that curl incorrectly handled certain TELNET connection options. Due to lack of proper input scrubbing, curl could pass on user name and telnet options to the server as provided, contrary to expectations. CVE-2023-27533 Harry Sintonen discovered that curl incorrectly...

TELNET option IAC injection

curl supports communicating using the TELNET protocol and as a part of this it offers users to pass on username and "telnet options" for the server negotiation. Due to lack of proper input scrubbing and without it being the documented functionality, curl would pass on username and telnet options ...

CURL-CVE-2023-27534 SFTP path ~ resolving discrepancy

curl supports SFTP transfers. curl's SFTP implementation offers a special feature in the path component of URLs: a tilde character as the first path element in the path to denotes a path relative to the user's home directory. This is supported because of wording in the once proposed to-become RFC...

CURL-CVE-2023-27533 TELNET option IAC injection

curl supports communicating using the TELNET protocol and as a part of this it offers users to pass on username and "telnet options" for the server negotiation. Due to lack of proper input scrubbing and without it being the documented functionality, curl would pass on username and telnet options ...

HSTS double free

libcurl supports sharing HSTS data between separate "handles". This sharing was introduced without considerations for doing this sharing across separate threads but there was no indication of this fact in the documentation. Due to missing mutexes or thread locks, two threads sharing the same HSTS...

Internet Bug Bounty: CVE-2023-27534: SFTP path ~ resolving discrepancy

A vulnerability was discovered in curl's SFTP implementation that allowed the tilde character to be used as a prefix in the first element of a path, resulting in the wrong path being accessed. This could be exploited to circumvent filtering or other security measures. The vulnerability was presen...

CVE-2023-27534

A path traversal vulnerability exists in curl 8.0.0 SFTP implementation causes the tilde character to be wrongly replaced when used as a prefix in the first path element, in addition to its intended use as the first element to indicate a path relative to the user's home directory. Attackers can...