Description
phpseclib is a PHP secure communications library. Starting in 0.1.1 and prior to 3.0.51, 2.0.53, and 1.0.28, phpseclib\Net\SSH2::get_binary_packet() uses PHP's != operator to compare a received SSH packet HMAC against the locally computed HMAC. != on equal-length binary strings in PHP uses memcmp(), which short-circuits on the first differing byte. This is a real variable-time comparison (CWE-208), proven by scaling benchmarks. This vulnerability is fixed in 3.0.51, 2.0.53, and 1.0.28.
Mitigation
Minimal update. May introduce new vulnerabilities or breaking changes.
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 packagist | | >=0.1.1 <1.0.28 || >=2.0.0 <2.0.53 || >=3.0.0 <3.0.51 | 1.0.28, 2.0.53, 3.0.51 |
 debian 11 | | =2.0.30-2 || =2.0.30-2+deb11u1 || =2.0.30-2+deb11u2 || =2.0.31-1 || =2.0.32-1 || =2.0.33-1 || =2.0.34-1 || =2.0.35-1 || =2.0.36-1 || =2.0.37-1 || =2.0.38-1 || =2.0.38-2 || =2.0.38-3 || =2.0.38-4 || =2.0.39-1 || =2.0.40-1 || =2.0.41-1 || =2.0.42-1 || =2.0.44-1 || =2.0.45-1 || =2.0.46-1 || =2.0.47-1 || =2.0.47-2 || =2.0.47-3 || =2.0.48-1 || =2.0.48-2 || =2.0.48-3 || =2.0.49-1 || =2.0.50-1 || =2.0.51-1 || =2.0.52-1 || =2.0.53-1 || =2.0.54-1 || =3.0.2-1 | - |
debian 12 | | =2.0.42-1 || =2.0.42-1+deb12u1 || =2.0.42-1+deb12u2 || =2.0.42-1+deb12u3 || >=0 <2.0.42-1+deb12u4 | 2.0.42-1+deb12u4 |
debian 13 | | =3.0.43-2 || =3.0.43-2+deb13u1 || >=0 <3.0.43-2+deb13u2 | 3.0.43-2+deb13u2 |
debian 13 | | =2.0.48-3 || =2.0.48-3+deb13u1 || >=0 <2.0.48-3+deb13u2 | 2.0.48-3+deb13u2 |
debian 12 | | =3.0.19-1 || =3.0.19-1+deb12u1 || =3.0.19-1+deb12u2 || =3.0.19-1+deb12u3 || =3.0.19-1+deb12u4 || >=0 <3.0.19-1+deb12u5 | 3.0.19-1+deb12u5 |
debian 11 | | =1.0.19-3 || =1.0.19-3+deb11u1 || =1.0.19-3+deb11u2 || =1.0.19-3+deb11u3 || =1.0.20-1 || =1.0.21-1 || =1.0.21-2 || =1.0.22-1 || =1.0.23-1 || =1.0.23-2 || =1.0.23-3 || =1.0.23-4 || =1.0.23-5 || =1.0.23-6 || =1.0.24-1 || =1.0.27-1 || =1.0.28-1 || =1.0.29-1 || =2.0.0-1 || =2.0.1-1 | - |
debian 12 | | =1.0.20-1 || =1.0.20-1+deb12u1 || =1.0.20-1+deb12u2 || =1.0.20-1+deb12u3 || >=0 <1.0.20-1+deb12u4 | 1.0.20-1+deb12u4 |
debian 13 | | =1.0.23-6 || =1.0.23-6+deb13u1 || >=0 <1.0.23-6+deb13u2 | 1.0.23-6+deb13u2 |
debian 14 | | =2.0.48-3 || =2.0.49-1 || =2.0.50-1 || =2.0.51-1 || =2.0.52-1 || >=0 <2.0.53-1 | 2.0.53-1 |
